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Lenovo ThinkPad T420i

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1. Y Y LCD Jall 5
2. FRU A PERIGO Chapter 1 Safety information 7 Antes de ligar o computador ap s a substituic o da FRU certifique se de que todos os parafusos molas e outras pecas pequenas estejam no lugar e n o estejam soltos dentro do computador Verifique isso sacudindo o computador e procurando ouvir sons de pecas soltas Pecas met licas ou lascas de metal podem causar curto circuito A PERIGO Algumas baterias reserva cont m uma pequena quantidade de n quel e c dmio N o desmo
3. CUIDADO Quando produtos a laser como CD ROMs unidades de DVD dispositivos de fibra tica ou transmissores est o instalados observe o seguinte remova as tampas A remoc o das tampas do produto a laser pode resultar em exposic o prejudicial 3 radiac o de laser h pecas que permitam manutenc o no interior do dispositivo Autilizac o de controles ou ajustes ou de procedimentos diferentes daqueles especificados aqui pode resultar em exposic o perigosa radiac o Algumas produtos a laser cont m um diodo de laser Classe ou Classe 3B integrado Observe o seguinte Radiac o a laser quando aberta N o olhe diretamente para o feixe a olho nu ou com instrumentos ticos e evite exposi o direta ao feixe 18 ThinkPad T420 and T420i Hardware Maintenance Manual A ATTENTION Si des produits laser tels que des unit s de CD DVD fibre optique ou des metteurs sont install s lisez les informations suivantes e Ne retirez pas les carters En ouvrant le produit laser vous vous exposez au rayonnement dangereux du laser Aucune piece de l unit n est r parable e Pour viter tout risque d exposition au rayon laser respectez les consignes de r glage et d utilisation des commandes ainsi que les proc d
4. When installing Insert the notched end of the DIMM into the socket Press the DIMM firmly and pivot it until it snaps into place Make sure that it is firmly fixed the slot and does not move easily 70 ThinkPad T420 and T420i Hardware Maintenance Manual 1070 PCI Express Mini Card for wireless WAN For access remove these FRUS in order 1010 Battery pack on page 63 1050 DIMM slot cover on page 69 Removal steps of PCI Express Mini Card for wireless WAN In step El unplug the jacks by using the removal tool antenna RF connector P N 08K7159 or pick the connectors with your fingers and gently unplug them in the direction of the arrow Step Screw quantity Torque H M2 3 mm wafer head nylon coated 1 Black 0 181 Nm 1 85 kgfcm Chapter 8 Removing and replacing a FRU 71 Note Plug the yellow cable into the jack labeled MAIN and the blue cable into the jack labeled AUX on the card If the computer you are servicing is a wireless WAN ready model and does not have a wireless WAN card route the antenna cables and secure them with a tape as shown in the following figure
5. 72 ThinkPad T420 and T420i Hardware Maintenance Manual 1080 Keyboard For access remove these FRUS in order 1010 Battery pack on page 63 1050 DIMM slot cover on page 69 Removal steps of keyboard Step Screw quantity Torque M2 x 10 mm wafer head nylon coated 1 Silver 0 181 Nm 1 85 kgfcm Push down the keyboard a little and slide it toward the arrow Ell to detach the front edge of the keyboard from the frame Chapter 8 Removing and replacing a FRU 73 Lift the keyboard a little in the direction shown by arrow and then detach the connector EJ Installation steps of keyboard When installing the keyboard do the following 1 Attach the keyboard connector 74 ThinkPad T420 and T420i Hardware Maintenance Manual 2 Attach the keyboard so that the keyboard edges EJ are under the frame 3 To make sure that the front edge of the keyboard is housed firmly gently press the keys with your palms and slightly slide the keyboard toward you until it snaps into position Chapter 8 Removing and replacing a FRU 75 4 Make sure that the front edge of the keyboard attached firmly 5 Secure the keyboard by tightening the screws from the bottom side of the computer 76 ThinkPad T420 and T420i Hardware Maintenance Manual 1090 DIMM in the slot under the keyboard For access remove these FRUS in order e 1010 Battery pack on p
6. extraiga las cubiertas La extracci n de las cubiertas del producto l ser podr a producir una exposici n a radiaci n l ser peligrosa No hay ninguna pieza dentro del dispositivo que pueda reparar Lautilizaci n de controles ajustes o la realizaci n de procedimientos diferentes a los especificados puede dar como resultado una exposici n peligrosa a radiaciones ac Algunos productos l ser contienen un diodo l ser de Clase 3A o Clase 3B incorporado Tenga en cuenta lo siguiente Emite radiaci n l ser cuando est abierto No fije la vista en el rayo no lo mire directamente con instrumentos pticos y evite la exposici n directa al rayo Chapter 1 Safety information 21 A Ed J E W CD ROM DVD SERRE BK FF aD FEAE m AE R EE WA FT AEE RU gt FART ASCH EO hl Rb eR SU IR BU RUN IRR 9 54 EE AS ARK BR 3B HERMAN AE UE MIE BOCES gt HE E dS RBA IER gt WEAR BEAR ANE 22 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 2 Important service information This chapter presents following important service information that applies to all machine types supported by this manual Strategy for replacing FRUs on page 3 Strategy for replacing a hard disk drive on page 23 Important notice for replacing a system board on page
7. xxG xxH xxK xxQ xxT xxV 4214417 3 pin 90 W 20 adapter models CTO xxA xxG xxH xxK xxQ xxT xxV 4274429 3 pin 90 W 20 V adapter models CTO xxB xxG xxH xxK xxQ xxT xxV 4274433 3 pin 90 W 20 V adapter models CTO xxG xxH xxK xxT xxV 45N0068 158 ThinkPad T420 and T420i Hardware Maintenance Manual Power 5 A ThinkPad power cord for a specific country or region is usually available only in that country region Table 15 Parts list 2 pin power cords Country or region Argentina e models Brazil e models CTO xxP Canada U S e models xxF xxL 5 xxU Japan e models CTO Table 16 Parts list 3 pin power cords Country or region Australia New Zealand e models CTO xxM Bangladesh Sri Lanka South Africa e models CTO xxG Canada U S e models CTO xxG xxT China P R C other than Hong Kong S A R e models CTO xxC Denmark e models CTO xxG European countries e models CTO xxG India e models CTO xxQ Israel e models CTO Italy e models CTO xxG Korea e models CTO xxK Switzerland e models CTO xxG Taiwan e models CTO xxV U K China Hong Kong S A R e models CTO xxB xxH CH 4275135 Chapter 10 Parts list CRU ID ID 159 Reco
8. TIREN DICK ThinkPad XRT WEAF LED 3 21831 HORARI LADO PNY 0 FAV ABFENTW A 0 E LEBT ASTU BEE xj kO PODER ET A RED CS ESV NY FU eR gt BAS Y VA RUDA Y y gt KEW e EHTS LL NYT 0 BH KLEY KF AyTy 2 EARUM D HOLCHER AE var WAVES ES 0 TIL DS CREW ki KEE CEET TT 422 REY MoET Y EETA L U BEKURO BHLEVTSZLIERSV ET 37 13 835 PYLE TLD 522727 Ny FY DRE COMER DBD HL 0 212 DLE O MEA BER 8942 CCE Ain 0 EE EN 3 5072 AY VARIA AY 1 1 0254 LTS HSV 7 7 2 EHATAL Ny TF U BBAKLED 70 2 27033 LCD LCD ORFORABERA En FICHE LEB IS Bar ED 72 gt bb 15 DBE gt gt ESV BEV 27212 HR amp EX SIT REV Eist kel 2 YI 0 Chapter 1 Safety information 13 A4wASwTU OBIEBGA amp S LIA IB MERO ERA DEE 0 SIM amp 0 5 RMLEDELTWS FRU BAY ADO TURN LIRA th 2 7121 TRATOR Fe YEU 7 ZRVI LT 21 1 TTS TFVETRTHY BELTS HEV daa us 3 o 252 ISE 039 A AA dupla vt ENN 2 3 Jue 214 E
9. 5Bx 5 5Dx 5Jx 5 5Lx 5Mx 5Nx 5 5Rx 5Tx 5Ux 5Vx 5Wx 5Xx 66x 67x 68x 69x 6Bx 6 6Ex 6Fx 6Gx 6Hx 6Jx 6Kx 6Lx 6Mx 6 6Qx 6 6Ux 6Zx 83x 84x 92x 93x 95x 96x 97x 98x 9Bx 9 9Fx 9Gx 9Px 9Qx 9Rx 9Vx 9Wx 9Yx 9Zx A7x A8x AAx ABx ADx AFx AGx AJx AKx ALx AMx ANx APx ARx ASx ATx AUx AVx AWx AYx AZx B2x B3x B4x B5x B6x B7x B9x BAx BBx BOx BDx BEx BGx BJx BKx BMx BNx BPx BSx BWx BYx C2x C8x C9x CBx COx CDx CEx CFx CJx CKx CLx CRx CSx CUx CWx CXx 4179 CTO G2x G3x G4x G5x G6x G7x G8x GBx GEx GGx GQx GRx GSx 4180 62x 63x K2x K3x K4x 5 K7x K8x K9x KAx KBx KCx KDx KEx KFx KGx KHx KJx KKx LDx LEx LFx LGx LHx LJx LKx LNx LPx LRx LSx LTx LUx LWx M2x M7x M8x M9x MBx MCx MDx MEx MJx MLx MNx MPx MQx MSx MUx MVx MWx MYx N2x NBx NOx NDx NFx PAx PBx PCx PDx PEx PFx PGx PHx PJx PVx PXx Q2x Q3x 4236 CTO 62x 63x MBx N2x N3x N5x N6x N7x N8x NOx NGx NHx NKx NLx NMx NNx NTx NUx NXx NYx P3x 4 P5x P6x P7x P8x P9x PAx PBx PCx PDx PGx PHx PJx PLx PMx PPx PQx PSx PTx PUx PVx PXx 4237 CTO 4238 CTO Fan assembly discrete 04W0408 e 4177 22x 23x 24x 2Ax 2Bx 2 2Jx 2Kx 2Lx 2Mx 2 2Px 2Tx 04W0410 2Ux 2 2Wx 2 2 32x 33x 34 GF
10. 50 mssann IN 73814717 01909 2359 MINIMA NI 025103 Uy V moo A IMAN PUN n2510n PIN NN 2595 yx APATI Donn 90 n309 IND aN n5510n INA P Du WINI AINA n5510n PINO NN DIDI IMN SPD IN 09199 IN UNS MINIMA e p5nn 19092 n3 ayan 22193 Y mph eomm IN ANAT 01999 NI NINDI Uy v AINON estilo DIDON A JUIN AVN IOS yx MVP 1191099 IN msisiann5 01925477 01949 112929 09939997 72230 55953 100 59 n51yn 1510557305 ANN ON IN 1 190 301g73n TANIA NN PI05 13 n55Yon NN PIVI v 0905 NIN NN PUNI PNY ASO NN PIVI PN DDIS SDN PINT AWAINA 22102 p v DM PIN Amssann IN PIV 1595 015 9199 NINN 722703 VID NJ 1 NN 1900 057 IN ODYY OY TONN 12 LCD Zorn van TOM ON Dun D0N ON NIN MARY 2395 MI mne MPT 15 Tuna 002 DN omn TOWN 1NN DVI Drun OY moo A 090995 Di PANNA 59 DI PIODIIA NOM NN DODD PN 35 15 pana A 0 n5159 IN 05510 NN 5293 1n PUN 32570710 AN P97 DN nnsn5 IN 19999 2200 moo A 12 ThinkPad T420 and T420i Hardware Maintenance Manual Ymon 2299 90919 Wye FRU n 5v mah Trump Y ON NON t 525n 55 NN pi 1155907 CND NN DY PND SoU 9929 55 NN AUNAN NN oanan FRU 0755956 ThinkPad BU SA 204 048728 EE
11. Some problems with your product can be resolved with a replacement part you can install yourself called a Customer Replaceable Unit or CRU Some CRUs designated as Self service CRUs and others are designated as Optional service CRUs Installation of Self service CRUs is your responsibility you request that Lenovo installs an Optional service CRU according to the warranty service for your product Where you are installing the CRU Lenovo will ship the CRU to you CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request You may find a list of CRUs in the publications that ship with your product or at http www lenovo com CRUs You may be required to return the defective part that is replaced by the CRU When return is required 1 return instructions a prepaid shipping label and a container will be included with the replacement CRU and 2 you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty 30 days of your receipt of the replacement CRU See your Lenovo Limited Warranty documentation for full details Screw notices Loose screws can cause a reliability problem In the ThinkPad Notebook this problem is addressed with special nylon coated screws that have the following characteristics They maintain tight connections They do not easily come loose even with shock or vibration They are hard
12. su sx de asd LOD 447 Eo SA gos ALB 85158 HF ae Xe FFE TFS Mr o BAA AA AA ALE FU 14 ThinkPad 420 and T420i Hardware Maintenance Manual AA AAS BAHIA espe FEA e AAA FAAS A IE MEAS AYL wa da Ea eus dag SHS 9817191 229 1997193 T gt AA 8 800431 4 VSG FRU 324 Hot Swap AAAA SE AF 21713817 AA AFAA AM 13 A7 2AENA AA SES MAAE AAG AAA BE Aes Sees Antes de encender el sistema despues de sustituir una FRU compruebe que todos los tornillos muelles y dem s piezas peque as se encuentran en su sitio y no se encuentran sueltas dentro del sistema Compru belo agitando el sistema y escuchando los posibles ruidos que provocar an Las piezas met licas pueden causar cortocircuitos el ctricos Algunas bater as de reserva contienen una peque a cantidad de n quel y cadmio No las desmonte ni recargue ni las eche al fuego o al agua ni las cortocircuite Des chelas tal como dispone la normativa local Utilice s lo bater as que se encuentren en la lista de piezas La utilizaci n de una bater a no apropiada puede provocar la ignici n o explosi n de la misma Las bater as contienen peque as cantidades de n quel No las desmonte recargue las eche al fuego al agua ni las cortocircuite Des chelas tal como dispone la normativa
13. B9x BAx BDx BEx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BTx BUx BVx BXx C3x 4 5 C6x C7x C8x C9x CAx CBx COx CDx CEx CFx CGx CHx CJx CKx CPx CQx CRx CSx CUx CVx CWx CXx CYx e 4179 GBx GEx e 4180 CTO 62x 63x 64x 65x K2x K4x K5x K8x K9x KAx KBx KOx KDx KEx KFx KGx KHx KJx KKx KMx KNx KPx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L8x L9x LAx LBx LUx LVx LWx LXx LYx LZx M2x M3x M4x 5 M6x M7x M8x M9x MBx MCx MDx MEx MHx MJx MKx MMx MNx MQx MRx MSx MTx MUx MVx MZx N2x 4 5 N8x N9x NAx NBx NDx NEx NFx PAx PBx PCx PEx PFx PGx PMx PNx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q2x Q3x Q4x Q5x Q8x e 4236 CTO 62x 63x 64x 65x MBx N2x N3x 4 5 NBx NFx NGx NHx NMx NSx NTx NUx NVx NXx NYx P2x P5x P6x P7x P8x P9x PAx PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PRx PTx PVx PWx PXx PYx e 4237 e 4238 CTO Table 21 Parts list Windows 7 Professional 64 bit recovery DVDs ID 162 ThinkPad T420 and T420i Hardware Maintenance Manual Table 21 Parts list Windows 7 Professional 64 bit recovery DVDs continuea ID Serbian Latin with English 0471342 Windows 7 Home Basic 32 bit DVDs Windows 7 Home Basic 32 bit is preinstalled as the operating system in the following models e
14. LRx LSx LTx LUx LVx LWx LXx LYx LZx M2x M3x M4x 5 M6x M7x M8x M9x MAx MBx MCx MDx MEx MFx MGx MLx MPx MQx MRx MSx MTx MUx MVx MWx MXx MYx MZx N2x N3x N4x N5x N6x N7x N8x N9x NAx NBx NOx NFx PAx PDx PEx PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PSx PTx PXx Q2x Q3x Q4x Q5x Q6x Q7x Q8x Q9x e 4236 CTO MBx N2x N3x N4x 5 N6x N7x N8x N9x NAx NBx NOx NDx NEx NFx NGx NHx NKx NLx NMx NNx NPx NQx NRx NSx NTx NWXx NXx NYx P2x P3x 4 P5x P6x P8x P9x PAx PBx PDx PEx PFx PGx PHx PJx PLx PPx PQx e 4237 e 4238 CTO 04W1624 N 196 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea sub card 1394 and USB 4177 2Fx 2Gx 2Kx 2Lx 2Mx 2 2Px 2Qx 2Rx 25 2 2Ux 2Vx 2Wx 2Yx 35x Q8x QBx QEx QHx QMx QNx R4x R8x RAx RDx RKx RLx RMx RQx RRx RSx RTx RUx RWx RXx 4178 CTO 6Bx 6 6Dx 6Ex 6Fx 6Gx 6Mx 6Nx 6Px 6Ux 6Vx 6Wx 9Fx 9Gx 9Hx 9Jx 9Kx 9Lx 9 9 95 9Tx 9Ux 9Vx 9Wx 9 9Yx 97 A2x A4x A8x A9x ADx AEx AFx ATx AWx AYx AZx B2x B3x B4x BGx BKx BSx C5x C7x C8x C9x CAx CEx CFx CGx CKx CMx CNx CQx CVx CWx 4179 CTO GBx GEx 4180 CTO 62x 63x 64x 65x MHx MJx MKx MMx MNx NDx
15. 4236 CTO NMx PAx PBx 4237 CTO 4238 CTO Solid state drive 160 GB e 4177 QEx QFx RXx e 4178 5Sx 6Gx 6Px 99x AEx AWx BNx C6x e 4179 e 4180 KBx L4x L5x L8x MDx MEx MQx PWx PZx e 4236 NSx NTx e 4237 e 4238 CTO Solid state flash drive 4 GB e 4177 CTO e 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO System board assembly integrated graphics AMT TPM e 4177 Q2x Q5x QAx QNx RMx e 4178 52x 56x 57x 59x 5Ax 5 5Vx 5Wx 5Xx 67x 68x 6Fx 6Gx 6Qx 6Ux 9Bx 9Cx 9Px 9Qx ABx ANx ASx ATx AWx AYx C8x e 4179 CTO GBx GQx GRx 4180 62x 63x K2x K4x K5x K6x K7x K8x K9x KAx KBx KCx KDx KEx KFx KGx KHx KJx KKx LDx LUx LWx M2x M7x M8x M9x MBx MDx MEx MJx MLx MNx MPx MQx MSx MYx N2x NBx NDx NFx PAx PBx PCx PFx PGx PHx PVx PXx Q2x Q3x 4236 62x 63x MBx N2x N3x N5x NGx NHx NUx P3x P5x P9x PAx PGx PLx PMx PXx 4237 CTO 4238 CTO System board assembly integrated graphics AMT non TPM 4177 CTO 2Hx 4178 CTO 4179 CTO 4180 CTO MCx 4236 CTO 4237 CTO 4238 CTO 142 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea FRU Overall FRU no System board assembly integrated graphics non AMT TPM 0
16. 5Vx 5Wx 5Xx 57 66x 67x 68x 69 6Ax 6Bx 6Cx 6Ex 6 6Kx 6Lx 6Mx 6Nx 6Qx 6Rx 65 6Ux 6Vx 6Wx 6Xx 6 67 82 92x 93x 94x 95x 96x 97x 98x 9 9Bx 9Cx 9Dx 9Fx 9Gx 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx 95 9 9Zx A2x A4x A5x A6x A7x A8x A9x ASx AXx AYx AZx B2x B8x B9x BDx BEx BFx BGx BHx BJx BKx BPx BQx BRx BSx BTx BUx BWx BXx BYx BZx C2x C4x C5x C7x C8x C9x CAx CBx COx CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CWx CYx 4179 CTO G3x GBx GDx GJx GMx GNx GPx GRx GUx GWx GXx 4180 CTO 65x J2x J3x J4x K5x KDx KGx KKx KNx KVx KXx KZx LBx LGx LHx LJx LKx Us LMx LPx LRx LSx LTx LXx LYx LZx M2x M3x M4x M5x M6x M8x MHx MKx MMx MNx MRx MTx MUx N2x N3x N4x N5x N6x N7x N8x N9x NAx PGx PLx PMx PNx PQx PRx PSx PTx PUx PVx PXx PYx Q3x Q4x Q5x Q7x Q8x Q9x 4236 CTO 65x N7x N8x N9x NAx NBx NDx NEx NFx NGx NPx NQx NRx NUx NVx NWx P2x P5x P6x P7x P8x P9x PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO Chapter 10 Parts list 141 Table 9 Parts list Overall continued Solid state drive 128 GB 45N8081 4177 CTO Q7x 45N8007 4178 5Rx ATx B7x 45N7981 4179 CTO 4180 CTO KAx L3x L6x L7x PAx
17. 92x 93x 94x 95x 96x 97x 98x 9Dx 9Ex 9Qx 9Rx 9Zx A2x 4 A8x A9x ANx APx ASx ATx AWx AXx AYx BGx BSx BTx BYx BZx C3x C4x C5x C6x C7x C8x CAx CWx 4179 GBx GQx GRx 4180 CTO 62x 63x 64x 65x J2x J3x K2x K3x K4x K5x K6x K7x K8x K9x KAx KBx KCx KDx KEx KFx KHx KJx KKx KLx KMx KPx KQx KRx KSx KTx KUx KVx KWx L4x L5x L6x L7x L8x L9x LAx LBx LCx LDx LLx LMx 1 LUx LVx LWx LXx LZx M2x M3x 4 Mix M8x M9x MBx MCx MDx MFx MGx MJx MKx MLx MNx MQx MRx MSx MYx MZx N2x N6x N7x N8x N9x NDx NEx PAx PBx PCx PFx PGx PHx PRx PSx PUx PVx PWx PXx PYx PZx Q2x Q3x Q4x Chapter 10 Parts list 131 Table 9 Parts list Overall continuea FRU Overall Intel Centrino Ultimate N 6300 60Y3233 4177 CTO 2Hx 2Ux QFx 4178 67x 99x 9 9 9Cx 4179 4180 KGx KXx KYx KZx L2x L3x 5 NFx PTx Q5x 4236 N4x NFx NGx NRx NWx P2x PFx PGx PMx 4237 4238 Intel Centrino Advanced N WiMAX 6250 WW SKU 60Y3195 ES 4177 CTO QAx QBx QEx QUx R7x 4178 CTO 9Px 4179 CTO 4180 CTO MPx 4236 CTO 4237 CTO 4238 CTO Intel Centrino Advanced N WiMAX 6250 Russia SKU 60Y3209 e 4177 CTO e 4178 CTO e 4179 CTO e 4180 CTO
18. Diagnostics gt ThinkPad Devices gt ac power adapter Battery 1 Battery2 LCD unit 1 Diagnostics gt Video Adapter 2 Interactive Tests gt Video Enter the ThinkPad Setup program and change Serial ATA SATA setting to Compatibility and run Diagnostics gt Other Device gt Conexant Audio Interactive Tests gt Internal Speaker Note Once Audio test is done the no sound is heard this test In this case turn off and turn on the computer Then run this test again Keyboard 1 Diagnostics gt Systemboard gt Keyboard 2 Interactive Tests gt Keyboard Hard disk drive or solid state drive Enter the ThinkPad Setup program and change Serial ATA SATA setting to Compatibility and run Diagnostics gt Fixed Disks Diskette drive 1 Diagnostics gt Diskette Drives 2 Interactive Tests gt Diskette Optical drive TrackPoint or pointing device Touch Pad 1 Diagnostics gt Other Devices gt Optical Drive 2 Interactive Tests gt Optical Drive Test 1 If two DIMMs are installed remove one of them and run Diagnostics gt System Memory 2 If the problem does not recur return the DIMM to its place remove the other one and run the test again If the TrackPoint does not work check the configuration as specified in the ThinkPad Setup program If the TrackPoint is disabled select Automatic to enable it After you use the TrackPoint the pointer may drift on the screen for a short time This drift can occur w
19. LLx LMx LNx LPx LRx LSx LTx LUx LVx LWx LXx LYx M2x M3x M4x 5 M6x M7x M9x MNx MVx MWx N6x NOx NDx NES PBx PDx PEx PJx PTx PXx Q2x Q6x Q7x Q9x 4236 CTO 62x 64x N2x N3x N5x NOx NDx NKx NLx NMx NQx NRx NUx NXx NYx 4 5 P6x P7x P8x P9x PAx PBx POx PDx PEx PHx PJx PLx PQx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO LCD module 14 0 inch HD 1600 x 900 LED backlight Anti Glare Display 93P5693 e 4177 2Kx 2Lx 2Nx 2Px 2Qx 2Yx 35x Q3x Q4x Q8x QAx QBx QFx QHx 93P5689 QKx QVx R4x R8x RAx RDx RKx RLx RMx RQx 4178 CTO 54x 55x 58x 59x 5Nx 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 5Zx 66x 68x 6Kx 6Lx 6Nx 6Px 6Rx 6Sx 6Vx 6Wx 6Xx 6Yx 82x 96x 97x 99x 9Ax 9Bx 9Cx 9Jx 9Kx 9Lx 9Mx 9Px 9Qx 9Rx 9Sx 9Tx 9Xx 9Zx A2x A3x A4x A8x A9x ASx AXx B8x BEx BFx BHx BJx BMx BNx BQx BRx BSx BTx BUx C5x C6x C7x C8x C9x CAx CBx CEx CGx CHx CVx CWx CYx 4179 CTO 4180 CTO 63x 65x J2x KHx KJx KKx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x 14 L5x L6x LAx LBx LQx LZx M8x MBx MDx MEx MFx MHx MJx MKx MMx MPx MQx MRx MSx MYx MZx N2x 5 N7x N8x N9x NAx NBx NFx PGx PNx PRx PSx PUx PVx PWx
20. MFx MLx NDx NEx PDx PEx PHx PJx 4236 CTO N3x N6x NMx NNx e 4237 CTO 4238 CTO Camera module No camera and no integrated microphone 04W1614 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Chapter 10 Parts list 151 Table 10 Parts list LCD FRUs continued LCD module 14 0 inch HD 1366 x 768 LED backlight Anti Glare Display 93P5691 e 4177 25x 26x 27x 28x 2Dx 2Jx 2 2Rx 25 2 2Ux 2Vx 2Wx 32x 93P5687 33x 34x Q2x Q5x Q7x QEx QGx QJx QLx QNx QPx QTx QUx QWx 04W0476 QXx QYx QZx R2x R3x R5x R6x R7x R9x RBx RCx RFx RGx RHx RJx RNx 93P5697 RPx RRx RSx RTx RUx RVx RYx RZx 4178 CTO 52x 56x 57x 5Ax 5Bx 5 5Dx 5Ex 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 69x 6Bx 6Cx 6Fx 6Hx 6Jx 6Mx 6Qx 6Tx 6Ux 83x 84x 92x 93x 94x 95x 98x 9Fx 9Gx 9Hx 9 9Ux 9Vx 9Wx 9Yx A5x A7x ABx AGx AHx AJx AKx AMx ANx APx ATx AUx AVx AWx AYx AZx B2x B3x B4x B5x B7x B9x BAx BBx BKx BPx BVx BWx BXx BYx BZx C2x C3x C4x COx CDx CFx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx 4179 CTO G2x G3x G4x G5x G6x G7x GEx GQx GRx GVx GWx 4180 64x K2x K3x K4x K5x K6x K7x K8x K9x KAx KBx KCx KDx KEx KFx KGx KLx KMx KNx L7x L8x L9x LOx LDx LEx LFx LGx LHx LJx LKx
21. N Table 9 Parts list Overall continuea FRU Overa CCU Slice battery 4274739 2 4177 4178 4179 4180 4236 4237 4238 DIMM slot door 04W1636 Integrated Mobile Broadband Gobi 3000 3G with GPS 60Y3257 4177 CTO 4178 CTO APx 4179 CTO 4180 CTO PFx 4236 CTO 4237 CTO 4238 CTO Integrated Mobile Broadband Gobi 3000 3G with GPS for Malaysia 60Y3283 e 4177 CTO e 4178 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Integrated Mobile Broadband Ericsson F5521gw 60Y3279 e 4177 CTO Q7x QFx 4178 CTO 54x 55x 5Ax 5Cx 5Ex 5Gx 5Tx 6Px 82x 94x 99x AMx B8x BHx BJx BNx BRx C2x C6x CHx CSx 4179 CTO 4180 K9x KBx KCx KFx KJx KMx KNx KSx KUx KVx KYx KZx L2x L4x L8x LBx LHx LUx LKx M5x MDx MFx PBx PTx 4236 CTO N2x N4x NAx NBx NFx NGx NMx NNx P2x PFx PGx PQx 4237 CTO 4238 CTO Integrated Mobile Broadband Ericsson F5521 gw for Malaysia 60Y3267 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Integrated China Telecom Mobile Broadband TD SCDMA Leadcore LC5740 60Y3261 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Chapter 10 Parts list 139 Table 9 Parts list Overall continuea Integrated China Telecom Mobile Broadband Huawei EM660 60Y3239 4177 4178 4179 4180 4236
22. N4x N5x N6x N7x N8x N9x NAx NDx NFx NGx NHx NLx NNx NPx NQx NRx NSx NTx NUx NWx NXx NYx P3x 4 P5x P7x P8x P9x PCx PDx PEx PGx PJx PLx PMx PPx PSx PTx PVx PWx PXx PYx e 4237 CTO e 4238 CTO 13 Battery pack Li ion 6 cell 26 4214817 e 4177 CTO 4274819 4178 e 4179 4180 4236 4237 4238 Battery pack Li ion 9 cell 55 4214799 e 4177 CTO Q3x Q4x Q7x QBx QFx 4274801 e 4178 58x 6Px 6Vx 6Wx 4 C5x CAx 4274912 4179 4180 65 KZx 9 PRx 5 Q4x Q5x 4236 65x P2x PKx PRx 4237 e 4238 CTO Base cover assembly 04W1626 e 4177 CTO e 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO e 4238 CTO Base cover assembly Taiwan 90 W 04W1627 e 4177 CTO RRx RSx RTx RUx e 4178 5Fx 5Hx 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx A5x A7x BUx BVx BXx CKx CLx CMx CNx CPx CQx 4179 CTO 4180 CTO 64x 65x MMx 4236 CTO 64x 65x NVx PRx 4237 CTO 4238 CTO Base cover assembly Taiwan 65 W 04W1628 4177 CTO QMx 4178 CTO 5Bx 5Dx 5Kx 66x 67x 68x 9Fx 9Gx BWx 4179 CTO 4180 CTO 62x 63x MBx MNx PAx 4236 CTO 62x 63x MBx NHx NUx PAx 4237 CTO 4238 CTO 138 ThinkPad T420 and T420i Hardware Maintenance Manual N N
23. Non ThinkPad devices b Devices attached to the docking station or the port replicator c Printer mouse and other external devices d Battery pack e Hard disk drive f External diskette drive or optical drive g DIMM h Optical disk or diskette in the internal drive i PC Cards 4 Turn on the computer 5 Determine whether the problem has been solved 6 If the problem does not recur reconnect the removed devices one at a time until you find the failing FRU 7 If the problem remains replace the following FRUs one at a time do not replace a nondefective FRU a System board b LCD assembly 48 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 5 Status indicators This chapter presents the system status indicators that show the status of the computer 49 O Copyright Lenovo 2011 Speaker mute The speaker is on mute To set the speakers mute unmute press the speaker mute button Microphone mute st The microphone is on mute None of the recording devices 15 available while the microphone mute is on by default Wireless LAN Wireless WAN or WiMAX status The wireless LAN feature the IEEE 802 11 b g standard 802 11 T a b g or 802 11n wireless WAN feature or WiMax feature is on and the radio link is ready for use Data is being transmitted Bluetooth wireless or Wireless USB status The Bluetooth wireless feature is on and the radio link is ready e E for use Data is being tr
24. Press cursor keys to select ATAPI CDx x 0 1 and then press Enter Follow the instructions on the screen The main panel of PC Doctor appears Select Diagnostics with the arrow keys and press Enter 0 209 PO Ur qm Note You can select an item not only with the arrow keys but also with the TrackPoint pointer Instead of pressing Enter click the left button A pull down menu appears Its exact form depends on the model Note PC Doctor menu does not mean the formal support device list Some unsupported device names may appear in the PC Doctor menu Diagnostics Interactive Tests Hardware Info Utility Quit F1 Help Run Normal Test Run Quick Test CPU Coprocessor System Memory Systemboard Video Adapter Fixed Disks Diskette Drives Other Devices Communication Wireless LAN PC DOCTOR 2 0 Copyright 2008 PC Doctor Inc All Rights Reserved Use the cursor keys and ESC to move in menus Press ENTER to select The options on the test menu are as follows Diagnostics Interactive Tests Run Normal Test Keyboard Run Quick Test Video CPU Coprocessor Internal Speaker System Memory Mouse Systemboard Diskette Video Adapter System Load Fixed Disks Optical Drive Test Diskette Drives Intel WLAN Radio Test Other Devices Communication Wireless LAN Notes In the Keyboard test in Interactive Tests the Fn key should be held down for at least
25. and English 0411388 C amp L Croatian Slovenian Croatian and English 04 1389 French Greek with English German Hebrew with English Hungarian with Engish Japanese Korea with English Polish Portuguese with English Romanian with English Russian Slovak with English Simplified Chinese Spanish Serbian Latin with English Traditional Chinese with English Traditional Chinese with English Hong Kong S A R 04711373 164 ThinkPad T420 and T420i Hardware Maintenance Manual Table 24 Parts list Windows 7 Home Premium 64 bit recovery DVDs continuea Language P N Turkish with English 04 1384 US English Disabled 0471385 US English 0471386 Windows 7 Ultimate 32 bit DVDs Windows 7 Ultimate 32 bit is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Table 25 Parts list Windows 7 Ultimate 32 bit recovery DVDs Language P N US English 0471321 Windows 7 Ultimate 64 bit DVDs Windows 7 Ultimate 64 bit is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Table 26 Parts list Windows 7 Ultimate 64 bit recovery DVDs Language P N US English 0471349 Chapter 10 Parts list 165 Common service tools Table 27 Parts list Common service tools Tool Screwdriver kit 1 4 drive spinner handle 1 4 50 to 1 4 hex torx adapter TR7
26. establish personal grounding by touching a ground point with one hand or by using an electrostatic discharge ESD strap P N 6405959 Copyright Lenovo 2011 61 Before servicing ThinkPad T420 and T420i Some models of the ThinkPad T420 and T420i you are servicing might have the SIM card that the customer has installed If the computer you are servicing has the SIM card remove it before you start the servicing To remove the SIM card you need to remove the battery pack first See 1010 Battery pack on page 63 After you finish the servicing make sure that you insert the card back into the slot firmly 62 ThinkPad T420 and T420i Hardware Maintenance Manual 1010 Battery pack Important notice for replacing a battery pack Lenovo ThinkVantage Toolbox in Windows 7 has an automatic battery diagnostic that determines if the battery pack is defective A battery pack FRU should not be replaced unless this diagnostic shows that the battery is defective The only exception to this is if the battery pack is physically damaged or a customer is reporting a possible safety issue If Lenovo ThinkVantage Toolbox is not installed in the computer the customer should download this program before a non physically damaged battery pack is replaced Note that the replacement of a physically damaged battery pack is not covered by the warranty Removal steps of battery pack y bancer Use only the battery specified in the parts list
27. wenn er 6 behandelt wird oder der Computer auf den Boden f llt Wenn der Bildschirm besch digt ist und die darin befindliche Fl ssigkeit in Kontakt mit Haut und Augen ger t sollten die betroffenen Stellen mindestens 15 Minuten mit Wasser abgesp lt und bei Beschwerden anschlieBend ein Arzt aufgesucht werden A VORSICHT Aus Sicherheitsgr nden die Kunststoffabdeckung die den unteren Teil der Spannungswandlerplatine umgibt nicht entfernen A VORSICHT Obwohl Hauptbatterien eine niedrige Spannung haben k nnen sie doch bei KurzschluB oder Erdung genug Strom abgeben um brennbare Materialien zu entz nden oder Verletzungen bei Personen hervorzurufen A VORSICHT Chapter 1 Safety information 11 ein Austausch der FRU bei laufendem Betrieb nicht erlaubt ist gehen Sie beim Austausch der FRU wie folgt vor Schalten Sie den Computer aus ziehen Sie alle Netzkabel von den Netzsteckdosen ab entfernen Sie den Akku und ziehen Sie alle miteinander verbundenen Kabel ab noo DAN Dop OPIN D pp Dn 290 Km v FRU NINN ANNI niyan 9399 NN 20202 v NNF NTN YT ANN JA MI DVM DIN DD DINO Dapp Grat Gr DY M9 IN PON pypu MIP 5 5 vpn hah 255595 525 PN B1 5U mop 59232 55312 5021052 0353 279970 nx v MIN 5325 IN 0725 IN UND nm 5v n5 Uh AMIN nyo5 Si ADAN n55103 gt v MIN menn 24 SY WINI
28. 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 1170 Fan assembly on page 97 Attention The CPU is extremely sensitive When you service the CPU avoid any kind of rough handling Removal steps of CPU Rotate the head of the screw in the direction shown by arrow release the lock and then remove the CPU After that peel the mylar off from the CPU as shown by arrow When installing Make sure that the mylar is attached to the CPU Place the CPU on the CPU socket and then rotate the head of the screw in the direction shown by arrow EJ to secure the CPU Chapter 8 Removing and replacing a FRU 101 1190 Base cover assembly and DC in connector cable For access remove these FRUS in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1030 Serial Ultrabay Enhanced device or travel bezel on page 65 1040 Hard disk drive HDD and solid state drive SSD on page 66 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120
29. 4237 4238 mSATA Solida State Drive 45N8259 Ey e 4177 CTO Q3x QAx QCx e 4178 5Ux 68x 9Cx A8x A9x AXx 4179 CTO 4180 CTO M6x PYx 4236 CTO 4237 CTO 4238 CTO HDD rubber rails 41V9756 HDD rubber rails 7 0 mm high HDD rubber rails 9 5 mm high bay 04W1640 Yid SSD spacers 04W1641 pis e 4177 CTO e 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO 4236 CTO N5x P4x 4211167 4237 CTO 4238 CTO SATA hard disk drive 320 GB 5 400 rpm 45N7219 e 4177 22x 25x 28x 2Dx 2 GLx GMx QDx QNx QQx QRx QSx 45N7297 QUx R7x RNx 45N7315 e 4178 CTO 5Ax 5Bx 5Cx 5Dx 9Vx AAx ABx AGx AQx CDx 45N7307 e 4179 G2x G4x G5x G7x G8x G9x 45N7287 e 4180 CTO KWx LEx LNx LUx M7x PJx Q2x 4271155 e SATA hard disk drive 250 GB 5 400 rpm 45N7217 e 4177 26x GKx QAx QCx 45N7229 4178 CTO 6Tx Aly 45N7305 4179 CTO 45N7285 4180 K3x K4x MFx MVx MWx PDx 4211153 4236 CTO N2x N6x NCx NXx NYx PCx PDx PEx 4237 CTO e 4238 CTO SATA hard disk drive 500 GB 5 400 rpm 45N7221 e 4177 CTO 45N7309 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO 140 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea No 19 19 9 FRU Overall SATA hard disk drive 160 GB 7200 rpm 45N7251 4177 CTO 45N7271 4178 CTO
30. 45N7317 4179 CTO 45N7323 4180 CTO 4211157 4236 CTO 4211169 4237 CTO 4238 CTO SATA hard disk drive 250 GB 7200 rpm 4211163 4177 CTO 4211173 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO SATA hard disk drive 320 GB 7200 rpm 45N7255 4177 CTO 23x 29x 2 2Fx 36x GFX Q2x Q4x Q5x QGx QUx QKx 45N7275 QLx QTx R2x R3x R5x RVx 45N7319 4178 CTO 52x 53x 54x 56x 58x 59x 5Ex 5Fx 5Gx 5Hx 5Kx 6Hx 6Jx 45N7325 83x 84x 9Ex 9Px 9Qx 9Rx 9Ux 9Wx 9 9Yx ACx ADx AKx AMx ANx 42T1159 APx AUx AVx B3x B4x 5 BBx BOx CRx CSx 42T1171 4179 CTO GOx GEx GGx GHx GQx GSx GTx GVx 4180 CTO 62x 63x 64x K2x K6x K7x K8x K9x KOx KEx KFx KHx KJx KLx KMx KPx KRx KSx KTx KUx KYx L2x L9x LAx LOx LDx LVx LWx M9x MBx MCx MGx MJx MLx MPx MSx MXx MYx MZx NBx NOx NDx NEx PBx POx PEx PFx PHx PKx PPx Q6x 4236 CTO 62x 63x 64x MBx N3x N4x NHx NKx NLx NNx P3x 4237 CTO 4238 CTO SATA hard disk drive 500 GB 7200 rpm 45N7257 4177 24x 27x 2Bx 2Cx 2Gx 2Hx 2Jx 2Kx 2Lx 2Mx 2Nx 2Px 45N7277 20x 2Rx 25 2 2Ux 2 2Wx 2 2Yx 32x 33x 34x 35x Q3x QBx 45N7321 QHx QMx QPx QVx QWx QXx QYx QZx R4x R8x R9x RAx RBx RCx RDx RFx RGx RHx RJx RKx RLx RMx RPx RQx RRx RSx RTx RUx RWx RYx RZx 4178 55x 57x 5Jx 51 5 5Nx 5Px 5Qx 5Tx 5Ux
31. 64x 65x J2x J3x KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L7x L8x L9x LAx LBx LOx LLx LMx LQx LVx LXx LYx LZx M4x M5x M6x MFx MGx MHx MKx MMx MRx N6x N7x N8x N9x NAx NEx PRx PSx PTx PUx PWx PYx PZx Q4x Q5x 4236 CTO 64x 65x N4x NAx NBx NDx NEx NFx NPx NQx NRx NSx NVx NWx P2x PFx PKx PNx PRx PYx 4237 CTO 4238 CTO System board assembly discrete graphics AMT non TPM 04W2050 N 4177 CTO 4178 CTO AXx 4179 CTO 4180 CTO MZx 4236 CTO 4237 CTO 4238 CTO Chapter 10 Parts list 143 Table 9 Parts list Overall continued no FRU Overall muse System board assembly discrete graphics non AMT TPM 04W2051 N e 4177 22x 23x 24x 2 2Bx 2 2Kx 2Lx 2 2Tx 2Ux 2Vx 2Wx 2Xx 2Yx 32x 33x 34x GFx GLx QEx QHx QPx QRx QWx QXx QYx QZx R4x RAx RDx RHx RJx RQx RTx RWx RXx RZx 4178 CTO 5Gx 5Hx 5Qx 5Sx 6Sx 82x 94x 9Dx 9Ex 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx A2x A5x AQx B8x BFx BHx BQx BRx BTx BUx BVx BXx BZx C4x CGx CHx CMx CNx CPx CQx CVx CYx 4179 CTO G9x GOx GDx GHx GJx GMx GNx GPx GTx GUx GVx GWx GXx 4180 CTO J4x M3x MAx MTx MXx N3x 4 N5x PKx PLx PMx PNx PPx PQx Q6x Q7x Q8x Q9x 4236 CTO N9x PWx 4237 CTO e 4238 CTO System board assembly discrete graphics non AMT non TPM 04W2052 4177 CTO
32. 73 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 Removal steps of SmartCard Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 2 0 181 Nm 1 85 kgfcm 88 ThinkPad T420 and T420i Hardware Maintenance Manual When installing Make sure that the connector is attached firmly Removal steps of SmartCard dummy spacer Some models have a SmartCard dummy spacer as a miscellaneous part For those models remove the spacer as shown Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 2 Black 0 181 Nm 1 85 kgfcm Chapter 8 Removing and replacing FRU 89 1140 Modem daughter MDC For access remove these FRUs in order e 1010 Battery pack page 63 1050 DIMM slot cover on page 69 1080 Keyboard on page 73 e 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 Removal steps of modem daughter card MDC Step Screw quantity M2 x 3 mm wafer head nylon coated 2 0 181 Nm 1 85 kgfcm When installing Make sure that the connector is attached firmly 90 ThinkPad T420 and T420i Hardware Maintenance Manual 1150 Speaker assembly For access remove these FRUS in order e 1010 Battery pack on page 63 1050 DIMM slot cover on page 69 1080 Keyboard on page 73 e 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on p
33. 8 If you have a Supplemental Recovery Disc insert it when prompted and click Yes If you do not have a Supplemental Recovery Disc click No 9 When all of the data has been copied from the last disc in the set and has been processed remove the disc and restart the computer Note The rest of the recovery process is fully automated and no action is required by you The computer will restart into the Microsoft Windows desktop several times and you might experience periods when no activity is apparent on the screen for several minutes at a time This is normal 10 When the recovery process is complete the Set Up Windows screen is displayed Follow the instructions on the screen to complete the Windows setup 11 After you have completed the Windows setup you might want to restore the original startup sequence Start the ThinkPad Setup program and then press F9 to restore the default settings Press F10 to save and exit the ThinkPad Setup program Note After restoring a drive to the factory default settings you might need to reinstall some device drivers Passwords As many as three passwords may be needed for any ThinkPad Notebook the power on password POP the hard disk password HDP and the supervisor password SVP If any of these passwords has been set a prompt for it appears on the screen whenever the computer is turned on The computer does not start until the password is entered Note If only an SVP is installed the p
34. 9Bx 9Cx 9Dx 9Ex 9Px 9Qx 9Rx 9Sx 9Tx 9Ux 9Vx 9Wx 9Xx 9Yx 9Zx A2x A8x A9x ABx ADx AEx AFx AHx AJx AKx ALx AMx ANx APx AQx ARx ASx ATx AUx AVx AWx AXx AYx AZx B2x B3x B4x B5x B6x B7x B8x B9x BAx BBx BCx BDx BEx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BTx BYx BZx C2x 4 C7x C8x C9x CBx COx CDx CEx CFx CGx CHx CJx CRx CSx CUx CVx CWx CXx CYx 4179 G2x G3x G4x G5x G6x G8x G9x GBx GCx GDx GEx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 62x 63x 64x J2x J3x J4x K2x K4x K5x K6x K7x K8x K9x KAx KBx KCx KDx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx L2x L3x L4x L5x L6x Chapter 10 Parts list 137 Table 9 Parts list Overall continuea FRU Overall Fauno forvi L7x L8x L9x LAx LBx LCx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LPx LQx LRx LSx LTx LUx LVx LWx LXx LYx LZx M2x M3x M4x M5x M6x M7x M8x M9x MBx MCx MDx MEx MGx MHx MJx MKx MLx MNx MPx MQx MRx MSx MTx MUx MVx MWx MXx MYx MZx N2x N3x N4x N5x N6x N7x N8x NBx NCx NDx NEx NFx PDx PEx PFx PGx PHx PKx PLx PMx PNx PPx PQx PTx PUx PVx PWx PXx PYx PZx Q2x Q3x Q6x Q7x Q8x Q9x 4236 CTO 62x 63x 64x MBx N2x N3x
35. Batterien des Typs verwenden der in der Ersatzteilliste aufgef hrt ist Der Einsatz falscher Batterien kann zu Entz ndung oder Explosion f hren 10 ThinkPad T420 and T420i Hardware Maintenance Manual A VORSICHT Akkus enthalten geringe Mengen von Nickel Sie d rfen nicht zerlegt wiederaufgeladen kurzgeschlossen oder Feuer oder Wasser ausgesetzt werden Bei der Entsorgung die rtlichen Bestimmungen f r Sondermill beachten Beim Ersetzen der Batterie nur Batterien des Typs verwenden der in der Ersatzteilliste aufgef hrt ist Der Einsatz falscher Batterien kann zu Entz ndung oder Explosion f hren A VORSICHT Die Systembatterie eine Lithiumbatterie Sie kann sich entz nden explodieren oder schwere Verbrennungen hervorrufen Batterien dieses Typs d rfen nicht aufgeladen zerlegt ber 100 C erhitzt oder verbrannt werden Auch darf ihr Inhalt nicht mit Wasser in Verbindung gebracht oder der zur richtigen Polung angebrachte Verbindungsstecker entfernt werden Bei der Entsorgung die rtlichen Bestimmungen f r Sonderm ll beachten Beim Ersetzen der Batterie nur Batterien des Typs verwenden der in der Ersatzteilliste aufgef hrt ist Der Einsatz falscher Batterien kann zu Entz ndung oder Explosion f hren A VORSICHT Die Leuchtstoffr hre im LCD Bildschirm enth lt Quecksilber Bei der Entsorgung die rtlichen Bestimmungen f r Sonderm ll beachten Der LCD Bildschirm besteht aus Glas und kann zerbrechen
36. CTO 4236 CTO 4237 CTO 4238 CTO Table 18 Parts list Windows Vista Business 32 bit SP2 recovery DVDs English for India 0471309 d US English 04T1311 160 ThinkPad T420 and T420i Hardware Maintenance Manual Windows Vista Home Basic 32 bit SP2 DVDs Note The Windows Vista recovery DVDs are available only for models with a valid Microsoft Windows Vista certificate of authenticity affixed to the system Due to a Microsoft licensing limitation if a model came with Windows Vista Business or Windows Vista Ultimate preinstalled from the factory but has a Windows 7 COA affixed to the system that model is eligible only for recovery DVDs that match the operating system specified on the COA Windows Vista Home Basic 32 bit SP2 is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Table 19 Parts list Windows Vista Home Basic 32 bit SP2 recovery DVDs Language P N US English 04 1312 Windows 7 Professional 32 bit DVDs Windows 7 Professional 32 bit is preinstalled as the operating system in the following models 4177 CTO Q7x QAx QDx QTx R5x R6x 4178 CTO 9Px 9Qx 9Ux 9Vx ACx ALx ASx AUx AVx BBx BCx 4179 CTO G3x G7x GQx GRx 4180 CTO K3x K6x K7x KLx KQx L7x LCx LDx LGx LHx LKx LPx LRx LSx LTx MES MLx MYx PHx PJx 09 4236 CTO N6x N7x N8x N9x NAx NDx N
37. Inc 1009 Think Place Building One Morrisville NC 27560 U S A Attention Lenovo Director of Licensing LENOVO GROUP LTD PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF NON INFRINGEMENT MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Some jurisdictions do not allow disclaimer of express or implied warranties in certain transactions therefore this statement may not apply to you This information could include technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication Lenovo may make improvements and or changes in the product s and or the program s described in this publication at any time without notice The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons The information contained in this document does not affect or change Lenovo product specifications or warranties Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties All information contained in this document was obtained in specific environments and is presented as an illustration The result obtained in other operating environments may vary L
38. Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 1170 Fan assembly on page 97 Removal steps of base cover assembly and DC in connector cable Step Screw quantity Torque M2 x 8 mm wafer head nylon coated 5 0 181 Nm 1 85 kgfcm 102 ThinkPad T420 and T420i Hardware Maintenance Manual Torque Screw quantity Step 0 181 Nm M2 5 mm wafer head 1 85 kgfcm When installing Make sure that the connector is attached firmly When installing Make sure that the wireless switch is adjusted as shown in callouts 103 Chapter 8 Removing and replacing a FRU Step Screw quantity Torque M2 3 mm wafer head nylon coated 1 0 181 Nm 1 85 kgfcm Note Applying labels to the base cover The new base cover FRU is shipped with a kit containing labels of several kinds When you replace the base cover you need to apply the following label Homologation label The following labels need to be peeled off from the old base cover and need to be put on the new base cover Note If the COA label Efl is attached to a part that is replaced return the old part with the label attached to the customer or provide a letter to the customer stating what the label was originally on the system and what the label part number serial number and product key were Windows
39. LZx M2x M3x M4x 5 M6x MBx MDx MEN MFx MHx MNx MQx MRx MSx MZx N2x N4x N5x N8x N9x NBx NCx NDx NEx NFx PAx PBx PCx PEx PFx PGx PMx PNx PQx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q2x Q3x Q4x Q5x Q8x 4236 CTO MBx N2x N3x N4x N5x NDx NEx NFx NGx NHx NMx NNx NPx NQx NRx NSx NTx NUx NVx NWx NYx P2x P8x P9x PAx PCx PDx PEx PFx PGx PHx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO Keyboard bezel assembly with fingerprint reader 04W1371 N e 4177 CTO 22x 23x 24x 27x 29x 2 2Bx 2Cx 2Dx 2Ex 2Fx 2Gx 2Hx 2Jx 2Kx 2Lx 2Mx 2Nx 2Px 2Qx 2Rx 2Sx 2Tx 2Ux 2 2Wx 2Xx 2Yx 32x 33x 34x 35x 36x GFx GKx GLx GMx Q2x Q3x Q4x Q7x Q8x QAx QBx QCx QEx QHx QPx QRx QTx QUx QVx QWx QXx QYx QZx R4x R5x R6x R7x R8x R9x RAx RBx RCx RDx RFx RGx RHx Rux RKx RLx RMx RNx RPx RQx RRx RSx RTx RUx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 5Bx 5 5Dx 5Ex 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 5 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 57 66x 67x 68x 69x 6 6Bx 6 6Fx 6Gx 6Hx 6Jx 6 6Lx 6Mx 6Nx 6Px 6Qx 6Rx 65 6Ux 6Vx 6Wx 6Xx 6Yx 6Zx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9Cx 9Dx 9Ex 9Jx 9Kx 9Lx 9Mx 9Px 9Qx 9Sx 9Tx 9U
40. NEx PBx PCx PRx PUx PVx PWx PYx PZx 4236 CTO 62x 63x 64x 65x NUx NVx P7x PKx PMx PNx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO RJ11 cable with connector 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Battery pack Li ion 4 cell 55 4214883 e 4177 CTO 2Dx GFx GKx QDx QEx RRx RSx RTx RUx 4274885 e 4178 CTO 66x 67x 68x 9Gx 9Hx 9Jx 9Kx 9Lx 9Mx 9 A5x A6x A7x AGx BUx BVx BWx CKx CLx CMx CNx CPx CQx 4179 CTO 4180 CTO PJx 4236 CTO 4237 CTO 4238 CTO Battery pack Li ion 6 cell 55 4214791 e 4177 CTO 22x 23x 24x 25x 26x 27x 28x 29x 2 2Bx 2 2Ex 2Fx 4274793 2Gx 2Hx 2Jx 2Kx 2Lx 2Mx 2Nx 2Px 2Qx 2Rx 25 2 2Ux 2 2Wx 4214795 2 2 32X 33x 34x 35x 36x GLx GMx Q2x Q5x QCx QGx 42 4911 QHx QUx QKx QLx QPx QQx QRx QSx QUx QVx QWx QXx QYx QZx R2x R3x R4x R5x R6x R7x R8x R9x RAx RBx RCx RDx RFx RGx RHx RJx RKx RLx RMx RNx RPx RQx RVx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 56x 57x 59x 5Ax 5Bx 5Cx 5Dx 5Ex 5Fx 5Gx 5Hx 5Jx 5 5Lx 5 5Nx 5Px 5Qx 5Rx 55 51 5Ux 5Vx 5Wx 5Xx 5Yx 5Zx 69x 6Ax 6 6Cx 6Ex 6Fx 6Gx 6Hx 6Jx 6Kx 6Lx 6Mx 6Nx 6Qx 6Rx 6Sx 6Tx 6Ux 6Xx 6Yx 6Zx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax
41. PCI Express Mini Card tor wireless LAN 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card 1130 SmartCard 1140 Modem daughter csi MDO 1150 Speaker assembly 41 41 41 41 43 43 45 46 46 46 48 48 49 53 57 57 58 58 59 59 61 62 63 64 65 66 69 70 71 73 77 79 81 83 88 90 91 1160 LCD unit 1170 Fan assembly 1180 CPU a e 1190 Base cover assembly and DC in connector cable La Bo Dk ux reg VUE 1200 Magnesium structure frame 1210 System board and ExpressCard slot assembly E EE 1220 mSATA solid state drive 2010 LCD bezel assembly 2020 LED board 2030 Integrated camera 2040 LCD panel and LCD cable 2050 Camera cable 2060 Wireless LAN antenna assembly or wireless LAN WAN antenna assembly 2070 Hinges and LCD rear cover assembly Chapter 9 Locations 93 97 101 102 106 108 110 112 113 115 117 119 120 122 125 ii ThinkPad T420 and T420i Hardware Maintenance Manual Front view Rear view Bottom view Chapter 10 Parts list Overall LCD FRUs Keyboard Miscellaneous parts Information about ac power adapters Power cords Recovery discs Common service tools Appendix A Notices Electronic emissions notices Trademarks 125 127 128 129 130 150 154 156 158 159 160 166 167 168 169 About this manual This manual contains service and reference information for the followin
42. TR 10 tamper resistant torx bits Removal tool antenna RF connector USB 2 0 CD RW DVD ROM combo drive II USB cable USB floppy diskette drive for maintenance diskette USB floppy diskette drive tool kit Test card for integrated Smart Card LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later Note Download the file from the following Web site http www lenovo com support 166 ThinkPad T420 and T420i Hardware Maintenance Manual P N 95F3598 1650840 93F2838 00P6967 08K7159 40Y8687 40Y8704 05K9283 2713452 4217820 Appendix A Notices Lenovo may not offer the products services or features discussed in this document in all countries Consult your local Lenovo representative for information on the products and services currently available in your area Any reference to a Lenovo product program or service is not intended to state or imply that only that Lenovo product program or service may be used Any functionally equivalent product program or service that does not infringe any Lenovo intellectual property right may be used instead However it is the user s responsibility to evaluate and verify the operation of any other product program or service Lenovo may have patents or pending patent applications covering subject matter described in this document The furnishing of this document does give you any license to these patents You can send license inquiries in writing to Lenovo United States
43. a supervisor password is set Type the password and press Enter The hard disk password prompt appears A hard disk password is set Type the password and press Enter LCD related symptoms Important The TFT LCD for the notebook computer contains many thin film transistors TFTs The presence of a small number of dots that are missing discolored or always lighted is characteristic of TFT LCD technology but excessive pixel problems can cause viewing concerns If the LCD you are servicing has two or less visible defective pixels it should not be considered faulty However if the LCD has three or more visible defective pixels it will be deemed as defective by Lenovo and it should be replaced Notes e This policy applies to all ThinkPad Notebooks purchased on 1 January 2008 or later 46 ThinkPad T420 and T420i Hardware Maintenance Manual e Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any replacement LCD will have zero pixel defects e One pixel consists of R sub pixels Table 6 LCD related symptoms Symptom or error FRU or action in sequence No beep power on indicator on and a blank LCD during System board POST LCD backlight not working Reseat the LCD connectors LCD too dark 3 LCD assembly LCD brightness cannot be adjusted System board LCD contrast cannot be adjusted LCD screen unreadable See important note for LCD rela
44. e 4236 CTO e 4237 CTO e 4238 CTO 1 GB DDR3 1333 SDRAM SO DIMM PC3 10600 card 55Y3715 e 4177 2Fx Q7x QAx e 4178 CTO 5Lx 5Mx 6Tx 92x 94x 96x 97x 9Ux ADx AKx e 4179 CTO e 4180 N3x N6x N7x e 4236 P5x P7x e 4237 CTO e 4238 CTO 2 GB DDR3 1333 SDRAM SO DIMM PC3 10600 card 55Y3716 n e 4177 22x 23x 24x 25x 26x 28x 2Dx 2 2Fx 2Gx 2Hx 2Qx 2Rx 2Xx 36x GFx GKx GMx Q2x 4 Q7x QEx QFx QQx QRx QSx QTx R5x R9x RNx RUx e 4178 CTO 56x 57x 58x 59x 5Ax 5 5 5Dx 5Fx 5Gx 5Hx 5Kx 5Lx 5Mx 66x 6Jx 6Mx 6Nx 6Sx 83x 84x 92x 94x 96x 97x 98x 99x 9Ax 9Bx 9Dx 9Ex 9Fx 9Gx 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx 9Px 9Qx 9Ux 9Vx A5x A6x A7x AAx ABx ADx AEx AGx AJx AKx ALx AQx ARx ASx AUx AVx BBx BGx BKx CDx CNx CYx e 4179 CTO G2x G3x G4x G5x G6x G8x G9x GCx GDx GEN GGx GHx GJx GPx GQx GSx GTx GUx GVx GWx e 4180 CTO 62x 63x 64x 65x J2x J3x J4x K3x K6x K7x KQx LOx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LRx LSx LTx LUx LVx LWx M7x M8x M9x MAx MCx MGx MLx MPx MTx MUx MVx MWx MXx N3x N6x N7x NAx PDx PHx PJx PKx PLx Q6x Q7x Q9x e 4236 CTO 62x 63x 64x 65x N6x N7x N8x 9 NAx NBx NOx NKx NLx NXx P3x 4 P5x P7x PBx PJx e 4237 e 4238 CTO 132 ThinkPad
45. e The latest Lenovo ThinkVantage Toolbox is available at the following Web site http web lenovothinkvantagetoolbox com e To install the latest Lenovo ThinkVantage Toolbox on the computer click Download Lenovo ThinkVantage Toolbox and then follow the instructions on the Web site To run this program do as follows Windows 7 While the Windows operating system is running press the ThinkVantage button To start this program do the following e Click Start gt Control Panel gt System and Security gt Lenovo System Health and Diagnostics Windows Vista and Windows XP Click Start gt All Programs gt ThinkVantage gt Lenovo ThinkVantage Toolbox Follow the instructions on the screen Lenovo ThinkVantageToolbox also has problem determination aids that determine software and usage problems Chapter 3 General checkout 31 For additional information about this program see the Help for the program 32 ThinkPad T420 and T420i Hardware Maintenance Manual FRU tests The following table shows the test for each FRU Table 1 FRU tests Systemboard Diagnostics gt CPU Coprocessor Diagnostics gt Systemboard If the docking station or the port replicator is attached to the ThinkPad Notebook detach it Place the computer on a horizontal surface and run Diagnostics gt ThinkPad Devices gt HDD Active Protection Test Note Do not apply any physical shock to the computer while the test is running
46. for your computer Any other battery could ignite or explode Unlock the battery latch Holding the battery latch in the unlocked position BH remove the battery pack in the direction shown by arrow When installing Install the battery pack in the slot Make sure that the battery latch is in the locked position Chapter 8 Removing and replacing FRU 3 1020 ExpressCard blank bezel Removal steps of ExpressCard blank bezel When you press the ExpressCard blank bezel it pops out Ell 64 ThinkPad T420 and T420i Hardware Maintenance Manual 1030 Serial Ultrabay Enhanced device or travel bezel For access remove this FRU e 1010 Battery pack on page 63 Removal steps of Serial Ultrabay Enhanced device or travel bezel Holding the bay lock latch in the unlocked position El slide the bay eject latch in the direction shown by arrow then pull out the Serial Ultrabay Enhanced device or the travel bezel in the direction shown by arrow to completely remove it Chapter 8 Removing and replacing a FRU 65 1040 Hard disk drive HDD and solid state drive 550 For access remove this FRU e 1010 Battery pack page 63 Attention Do not drop the drive or apply any physical shock to it The drive is sensitive to physical shock Improper handling can cause damage and permanent loss of data Before removing the drive have the user make a backup copy of all the information on it if possibl
47. la bater a y desconecte los cables de interconexi n A Schk FRU 1 248 gt GRRE ZA gt REENA HERE VE ee AERA EME gt ARA A BIEN BRAD gt SR Asn 812788 SS E EE IE 0 AAE BAKE ENE RIES EU ERE FF E HEE AME SE BU Sth Be EMELE KX BURKE Ajo RO 02 5212 1 522 1 E O E hE E o PELE gt 77838 AGRA BSR H 100 C 212 F gt IS 212 AR HUE THERE EN o T BR SE FE SE f EME Asn 16 ThinkPad T420 and T420i Hardware Maintenance Manual LCD 18205835 LCD AEREAS S BU D A A 15 5338 OR TET A RRA AY EIEN gt ARES gt PRE Asn BERE BHA ER RAE v AI ATE AE PIE DIE AE P el SER PAT BRIE FRU ARIAS HSER Lie SA REESE HERARN Laser compliance statement multilingual translations The laser compliance statements in this section are provided in the following languages e English e Arabic e Brazilian Portuguese e French German Hebrew e Japanese e Korean Spanish e Traditional Chinese A CAUTION When laser products such as CD ROMs DVD drives fiber optic devices or transmitters are installed note the following Do not remove the covers Removin
48. local Utilice s lo bater as que se encuentren en la lista de piezas al sustituir la bater a La utilizaci n de una bater a no apropiada puede provocar la ignici n o explosi n de la misma La bater a de repuesto es una bater a de litio y puede provocar incendios explosiones quemaduras graves No la recargue ni quite el conector polarizado ni la desmonte ni caliente por encima de los 100 C 212 F ni la incinere ni exponga el contenido de sus celdas al agua Des chela tal como dispone la normativa local Si la LCD se rompe y el fluido de su interior entra en contacto con sus ojos o sus manos lave inmediatamente las reas afectadas con agua durante 15 minutos como m nimo Obtenga atenci n medica si se presenta alg n s ntoma del fluido despues de lavarse Chapter 1 Safety information 15 7 Para evitar descargas no quite la cubierta de pl stico que rodea la parte baja de la tarjeta invertida Aunque las bater as principales tienen un voltaje bajo una bater a cortocircuitada con contacto a tierra puede producir la corriente suficiente como para quemar material combustible o provocar quemaduras en el personal y E Salvo que se permita el intercambio en caliente para la unidad sustituible localmente realice lo siguiente antes de extraerla apague el sistema desconecte todos los cables de alimentaci n de las tomas de alimentaci n el ctrica extraiga
49. modified options can lead to false indications of errors and invalid system responses 1 Identify the failing symptoms in as much detail as possible 2 Verify the symptoms Try to re create the failure by running the diagnostic test or by repeating the operation Diagnostics using PC Doctor for DOS The ThinkPad Notebook has a test program called PC Doctor for DOS hereafter called PC Doctor You can detect errors by running the diagnostics test included in PC Doctor Note PC Doctor for DOS is available at the following Web site http www lenovo com support To create the PC Doctor diagnostic CD follow the instructions on the Web site For some possible configurations of the computer PC Doctor might not run correctly To avoid this problem you need to initialize the computer setup by use of the ThinkPad Setup program before you run PC Doctor To enter the ThinkPad Setup program do as follows 1 Turn on the computer 2 When the ThinkPad logo comes up immediately press F1 to enter the ThinkPad Setup program Note If a supervisor password has been set by the customer the ThinkPad Setup program menu appears after the password is entered You can start the ThinkPad Setup program by pressing Enter instead of entering the supervisor password however you cannot change the parameters that are protected by the supervisor password On the ThinkPad Setup program screen press F9 Enter F10 and then Enter Note When you init
50. outlets remove the battery pack and disconnect any interconnecting cables FRU 6 ThinkPad T420 and T420i Hardware Maintenance Manual Y
51. support Restoring the factory contents by using Recovery Disc Set When the hard disk drive HDD or solid state drive SSD is replaced because of a failure no product recovery program is on the new drive this case you must use the Recovery Disc Set for the computer Order the Recovery Disc Set and the drive at the same time so that you can recover the new drive with the pre installed software when they arrive For information on which discs to order see Recovery discs on page 160 The recovery disc set consists of the user instructions and the following set of DVDs to restore the computer to the original factory configuration Operating System Recovery Disc one disc This disc restores the Microsoft Windows operating system Use this disc to start the recovery process Applications and Drivers Recovery Disc one or This disc restores the preinstalled applications and more discs drivers on the computer Supplemental Recovery Disc This disc contains additional content such as updates to the software that was preinstalled on the computer Not all recovery disc sets come with a Supplemental Recovery Disc Notes e You must have a DVD drive to use the recovery discs If you do not have an internal DVD drive you use an external USB DVD drive e During the recovery process all data on the drive will be deleted If possible copy any important data or personal files that you want to keep onto removable media or
52. 010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 2010 LCD bezel assembly on page 112 2020 LED board on page 113 2030 Integrated camera on page 115 2040 LCD panel and LCD cable on page 117 Removal steps of camera cable Chapter 8 Removing and replacing a FRU 119 2060 Wireless LAN antenna assembly or wireless LAN WAN antenna assembly For access remove these FRUs in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 3 2010 LCD bezel assembly on page 112 2020
53. 2 seconds otherwise it cannot be sensed Video Adapter test supports only the LCD display on the ThinkPad Notebook If you have an external monitor attached to your computer detach it before running PC Doctor for DOS To test Digital Signature Chip the security chip must be set to Active 10 Run the applicable function test 30 ThinkPad T420 and T420i Hardware Maintenance Manual 11 Follow the instructions on the screen If there is a problem PC Doctor shows messages describing it 12 To exit the test select Quit Exit Diag To cancel the test press Esc Note After running PC Doctor check the time and date on the system and reset them if they are incorrect Detecting system information with PC Doctor PC Doctor can detect the following system information Hardware Info System Configuration Memory Contents Physical Disk Drives VGA Information ATA Drive Info PCI Information PNPISA Info SMBIOS Info VESA LCD Info Hardware Events Log Utility Run External Tests Benchmark System DOS Shell Tech Support Form Battery Rundown Erase Drive Contents View PCDR Host Log Lenovo ThinkVantage Toolbox Lenovo ThinkVantage Toolbox is a diagnostic program that works through the Windows operating system It enables you to view symptoms of computer problems and solutions for them and includes automatic notification when action 15 required computing assistance advanced diagnostics and diagnostic history Notes
54. 24 How to use error message on page 24 Strategy for replacing FRUs for CTO CMV and GAV on page 5 Product definition on page 25 FRU identification for and products on page 25 Important Advise customers to contact the Lenovo Customer Support Center if they need any assistance in obtaining or installing any software fixes drivers and UEFI BIOS downloads Telephone numbers forLenovo Support are available at http www lenovo com support System Disassembly Reassembly videos that show the FRU removals or replacements for the Lenovo authorized service technicians are available in the following support site http Awww lenovoservicetraining com ion Strategy for replacing FRUs Before replacing parts Make sure that all software fixes drivers and UEFI BIOS downloads are installed before replacing any FRUs listed in this manual After a system board is replaced ensure that the latest UEFI BIOS is loaded to the system board before completing the service action To download software fixes drivers and UEFI BIOS go to http www lenovo com support and click Download Drivers 8 Software Then follow the instructions on the screen to install the necessary software Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs e If you are instructed to replace a FRU but the replacement does not correct the problem reinstall the original FRU befo
55. 4177 22x 23x 24x 2Ex 2Xx 36x GFX GKx GLX GMx QQx QRx e 4178 CTO 6Sx 9Dx 9Ex AQx ARx e 4179 G8x G9x GCx GDx GHx GJx GPx GSx GTx GUx GVx GWx e 4180 J2x J3x J4x MAx MGx MXx N3x N6x N7x PKx PLx Q6x Q7x e 4236 CTO e 4237 CTO e 4238 CTO Table 22 Parts list Windows 7 Home Basic 32 bit recovery DVDs ID Windows 7 Home Premium 32 bit DVDs Windows 7 Home Premium 32 bit is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO G4x 4180 CTO LNx 4236 CTO NCx 4237 CTO 4238 CTO Chapter 10 Parts list 163 Table 23 Parts list Windows 7 Home Premium 32 bit recovery DVDs ID English for India 0471362 Simplified Chinese 04 1361 US English 0471363 Windows 7 Home Premium 64 bit DVDs Windows 7 Home Premium 64 bit is preinstalled as the operating system in the following models 4177 2Jx 2Lx 2Mx 2Tx 2Vx 2 34x QFx QJx QUx QWx QZx R7x RHx RSx RUx 4178 9Fx 9Nx BWx CLx CMx CNx 4179 CTO GMx GNx 4180 CTO NCx PQx 4236 CTO NPx NQx NRx NWx 4237 CTO 4238 CTO Table 24 Parts list Windows 7 Home Premium 64 bit recovery DVDs Arabic with English 04 1364 0 Brazilian Portuguese 0471365 Czech with English 0471368 C amp L Nordics Danish Finnish Swedish Norwegian and English 0471387 C amp L EMEA Dutch French German Italian
56. 4178 CTO 4179 CTO 4180 CTO 9Sx 9Tx 9Ux 9Xx AEx 4236 CTO 4237 CTO 4238 CTO P4x PAx PBx 4237 CTO 4238 CTO CPU assembly i5 2540M 2 60 GHz 04W0493 e 4177 CTO 2Gx 2Px Q2x Q3x Q4x QLx RLx RMx e 4178 54x 55x 57x 59 5Wx 6Px 6Rx 9Lx ATx BNx C7x e 4179 CTO e 4180 63x 65x 5 K9x KAx KEx KFx KJx KKx KLx KMx KTx KUx KWx L5x 19 LCx LDx LJx LKx LLx LMx M4x MBx MKx NDx NEX 4236 CTO 63x 65x MBx N2x N5x NAx NBx NHx NSx NTx P5x PCx PDx 4237 CTO 4238 CTO CPU assembly 5 2520 2 50 GHz 04W0492 4177 CTO 2Fx 2Nx Q5x Q8x QNx 4178 52x 56x 58x 5Bx 5Ex 5Fx 5 57 68x 6 6Qx 6Ux 6Vx 6 6Yx 9Bx 9Cx 9 9 9Tx 9Wx A9x ACx ANx APx ASx 4179 CTO G2x G3x G4x GBx GEx GQx 4180 62x 64x J2x J3x K2x K3x K4x K6x K7x K8x KPx KQx KRx KSx L6x L7x L8x LEx LFx LGx LHx LNx LUx LVx LWx LXx M2x 7 M8x M9x MCx MDx MGx MHx MJx MLx MPx MSx MYx MZx N6x N7x N8x NBx PAx PBx PCx PDx PEx PFx PHx PJx PVx PWx 4236 62x 64x N3x N6x N7x N8x N9x NCx NNx NUx P3x 144 ThinkPad T420 T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea CPU assembly 17 2620 2 70 G
57. 4W2047 4177 25x 26x 27x 28x 29x 2Dx 2 2Qx 2Rx 25 35x 36x GKx GMx Q7x QCx QDx QGx QUx QKx QLx QMx QQx QSx QTx QUx QVx R2x R3x R5x R6x R7x R8x R9x RBx RFx RGx RNx RPx RRx RSx RVx RYx 4178 CTO 53x 5Cx 5Dx 5Jx 5Kx 5Lx 5Mx 5Nx 5Px 5Rx 5Tx 5Ux 66x 69x 6 6Cx 6 6Jx 6Kx 6Mx 6 83x 84x 92x 93x 95x 96x 97x 98x 9Fx 9Gx 9Rx 9Zx A7x A8x AAx ACx AFx AGx AMx ARx AUx AVx AZx B2x B3x B4x B5x B6x B7x B9x BAx BBx BCx BDx BEx BGx BJx BKx BMx BNx BPx BSx BWx BYx C2x C3x C9x CBx CCx CDx CEx CFx CJx CKx CLx CRx CSx CUx CWx CXx 4179 CTO G2x G3x G4x G5x G6x G7x G8x GEx GGx GSx 4180 CTO LEx LFx LGx LHx LJx LKx LNx LPx LRx LSx LTx MUx MVx MWx NOx PDx PEx PJx 4236 CTO N6x N7x N8x NOx NKx NLx NXx NYx 4 P6x P7x P8x PBx PCx PDx PEx PHx PJx PPx PQx PSx PTx PUx PVx 4237 CTO 4238 CTO System board assembly integrated graphics non AMT non TPM 04W2048 N 4177 2Fx 2Gx 4178 CTO 6Tx 9Vx 9Wx 9Yx ADx AJx AKx 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO System board assembly discrete graphics AMT TPM 04W2049 N 4177 2Jx 2Nx 2Px Q3x Q4x QBx QFx RKx RLx 4178 CTO 54x 55x 58x 5Fx 57 6Ax 6Px 6Rx 6Vx 6Wx 6Xx 6Yx 99x 9Ax A3x A4x 9 5 C7x 4179 CTO 4180 CTO
58. 5 12 I O sub card USB only 04W1630 e 4177 22 23x 24x 25 26 27 28x 29x 2 2Bx 2Cx 2Dx 2 2Jx 2Xx 32x 33x 34x 36x GFx GKx GLx GMx Q2x Q3x Q4x Q5x Q7x QAx QDx QFx QGx QUx QKx QLx QPx QQx QRx QSx QTx QUx QVx QWx QXx QYx QZx R2x R3x R5x R6x R7x R9x RBx RCx RFx RGx RHx RJx RNx RPx RVx RYx RZx e 4178 CTO 52x 53x 54x 55x 56x 57x 58x 59x 5Bx 5Cx 5Dx 5Ex 5Gx 5Hx 5Jx 5 5Lx 5Mx 5Nx 5Px 5Qx 5Rx 55 5Tx 5Ux 5Vx 5Wx 5 5Yx 57 66x 67x 68x 69x 6Ax 6Hx 6Jx 6Kx 6Lx 6Qx 6Rx 65 6Tx 6Xx 6Yx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9Cx 9Dx 9Ex 9Px 9Qx 9Rx A5x A6x A7x ABx ACx AGx AHx AMx ANx APx AQx ARx ASx AUx AVx B5x B6x B7x B8x B9x BBx BDx BEx BFx BHx BJx BMx BNx BQx BRx BUx BVx BWx BXx BYx BZx C2x C3x C4x CBx COx CDx CHx CJx CRx CSx CUx e 4179 CTO G2x G3x G4x G5x G6x G7x G8x G9x GOx GDx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx e 4180 CTO J2x J3x J4x K2x K3x K4x K5x K6x K7x K8x K9x KAx KBx KCx KDx KEx KFx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x 14 L5x L6x L7x L8x L9x LAx LBx LOx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LPx LQx
59. 63 1050 DIMM slot cover on page 9 1080 Keyboard on page 73 Removal steps of PCI Express Mini Card for wireless LAN In step E unplug the jacks by using the removal tool antenna RF connector P N 08K7159 or pick the connectors with your fingers and gently unplug them in the direction of the arrow Note Some models might have only two antenna cables Step Screw quantity Torque H M2 x 10 mm wafer head nylon coated 1 Silver 0 181 Nm 1 85 kgfcm Chapter 8 Removing and replacing a 81 When installing e n models with a wireless LAN card that has two antenna connectors plug the gray cable into the jack marked MAIN or M and the black cable into the jack marked AUX or A on the card If the computer you are servicing has three cables put the white cable in the cable protection tube and secure it with a tape as shown in this figure n models with a wireless LAN card that has three antenna connectors plug the gray cable MAIN into the jack marked TR the white cable third into the jack marked RO or TR3 and the black cable AUX into the jack marked TR2 on the card 82 ThinkPad T420 and T420i Hardware Maintenance Manual 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card For access remove these FRUS in order 1010 Battery pack on page 3 1020 ExpressCard blank on page 64 1050 DI
60. 9Dx 9Ex 9Fx 9Gx 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx 9Px 9Qx 9Rx 9Sx 9Tx 9Ux 9Vx 9Wx 9Xx 9Yx 9Zx A2x A3x A4x 5 A7x A8x A9x AAx ADx AFx AGx AJx AKx ALx AMx ANx APx AQx ARx ASx ATx AUx AVx AWx AXx AYx AZx B2x B3x B4x B5x B6x B7x B8x B9x BAx BBx BCx BDx BEx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BUx BVx BWx BXx BYx BZx C2x C3x C4x C5x C6x C7x C8x C9x CAx CBx CCx CDx CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx CVx CWx CXx CYx 4179 G3x G4x G5x G8x G9x GBx GCx GDx GGx GHx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 CTO 63x 64x 65x J2x J3x J4x K7x K8x K9x KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L7x L8x L9x LAx LBx LDx LFx LGx LHx LLx LMx LNx LRx LSx LTx LVx LXx LYx LZx M2x M3x M4x M5x M6x M7x M8x M9x MAx MBx MCx MDx MGx Mux MKx MMx MNx MPx MQx MRx MSx MTx MUx MVx MWx MXx MYx MZx N2x N3x N4x N5x N6x N7x N8x N9x NAx NBx NOx NFx PAx PBx PFx Camera module No camera and with microphone 04W1613 4177 Q7x QOx QFx QTx R5x 4178 CTO ACx 4179 CTO G2x GEx 4180 CTO K2x K3x K4x K5x K6x KPx LEx LJx LKx LUx
61. Certificate of Authentication label COA Wireless LAN MAC address label Information label Ethernet MAC address label CODO 104 ThinkPad T420 and T420i Hardware Maintenance Manual ka 25 2 un 5 BOA kA Ki ES LJ LJ E 25 o N e Wireless WAN MAC address label China mobile IMEI label China telecom IMEI label SIRM labels only for Malaysia Wireless card label only for Brazil Anatel label only for Brazil Modem AMOM label only for Brazil Bluetooth label only for Brazil Israel label 50 mm x 19 mm No MIC label only for TAA module assembled in Mexico Vodafone label FCC label Asset tag Serial number label Product label China wireless WAN label China modem label For some models you need to apply two FCC labels Check the old base cover if it has two FCC labels apply both to the new base cover For the location of each label refer the following figure 0 VG h MITT MM ZZ IIMA 2 2 El ESI ME 22727 207720 Ss 477777 2 27777777 2 47777777 0 2 OPEL LLL Chapter 8 Removing and replacing a FR
62. D mat or a corrugated conductive surface After replacing the system board run PC Doctor for DOS to make sure that HDD Active Protection System still functions The procedure is as follows 1 Place the computer on a horizontal surface 2 Run Diagnostics gt ThinkPad Devices gt HDD Active Protection Test Attention Do not apply physical shock to the computer while the test is running Removal steps of system board and ExpressCard slot assembly The following components soldered on the top side of the system board are extremely sensitive When you service the system board avoid any kind of rough handling E CPU n Accelerometer chip for the HDD Active Protection System 108 ThinkPad T420 and T420i Hardware Maintenance Manual Platform Controller Hub Graphic Processing Unit GPU Discrete graphics chip Note The 15 only for models with switchable graphics Models with integrated graphics do not have a GPU on the system board For Switchable Graphics models For Integrated Graphics models Chapter 8 Removing and replacing a FRU 109 Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 1 Black 0 181 Nm 1 85 kgfcm When installing Make sure that the connector is attached firmly 1220 mSATA solid state drive For access remove these FRUs in order e 1010 Battery pack on page 63 1050 DIMM slot cover on page 69 Attention Do not drop t
63. EPROM on the system board was loaded with the serial numbers of the system and all major components These numbers need to remain the same throughout the life of the computer If you replace the system board you must restore the serial number of the system unit to its original value Before replacing the system board save the original serial number by doing the following 1 Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later and restart the computer 2 From the main menu select 1 Set System Identification 3 Select 2 Read S N data from EEPROM The serial number of each device in your computer is displayed the serial number of the system unit is listed as follows e 20 Serial number Write down that number Note The serial number of the system unit is also written on the label attached to the bottom of the computer After you have replaced the system board restore the serial number by doing the following 1 Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later and restart the computer 2 From the main menu select 1 Set System Identification 3 Select 1 Add S N data from EEPROM Follow the instructions on the screen H the MTM and Product ID numbers differ from each other on the rear label use what is shown for the Product field See example below 58 ThinkPad T420 and T420i Hardware Maintenance Manual MTM on rear label S N 5555555 Pr
64. Ex NLx e 4237 CTO e 4238 CTO Table 20 Parts list Windows 7 Professional 32 bit recovery DVDs Language P N French 0471314 5 German 0471315 0471316 C amp L Nordics Danish Finnish Swedish Norwegian and English 0471319 C amp L EMEA Dutch French German Italian and English 0471320 0411317 Simplified Chinese 0411313 Traditional Chinese with English Hong Kong S A R 0471611 US English 0471318 Windows 7 Professional 64 bit DVDs Windows 7 Professional 64 bit is preinstalled as the operating system in the following models e 4177 CTO 25x 26x 27x 28x 29x 2Ax 2Bx 2Cx 2Dx 2Kx 2 2Px 2Qx 2Rx 2Sx 2Ux 2Wx 32x 33x 35x Q2x Q3x Q4x Q5x Q8x QBx QCx QEx QGx QHx QKx QLx QMx QNx QPx QVx Chapter 10 Parts list 161 QXx QYx R2x R3x R4x R8x R9x RAx RBx RCx RDx RFx RGx RJx RKx RLx RMx RNx RPx RQx RRx RTx RVx RWx RXx RYx e 4178 52x 53x 54x 55x 56x 57x 58x 59x 5Ax 5Bx 5Cx 5Dx 5Ex 5Fx 5Gx 5Hx 5Kx 5Mx 5Px 5Qx 5Rx 55 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 57 66x 67x 68x 6Cx 6Ex 6Fx 6Gx 6Hx 6Kx 6Mx 6Nx 6Px 6Qx 6Rx 6Ux 6Vx 6Wx 6Yx 82x 83x 84x 93x 96x 99x 9Ax 9Bx 9Cx 9Gx 9Jx 9Kx 9Lx 9Mx 9Rx 95 9 9Wx 9Xx 9Yx 9Zx A2x A3x A4x A5x A7x A8x A9x ABx ADx AEx AFx AGx AHx AKx AMx ANx APx ATx AWx AXx AYx B2x B3x 5 B7x B8x
65. G2x G3x G4x G5x G6x G7x G8x G9x GOx GDx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 J2x J3x J4x K2x 4 K5x K6x K7x K8x K9x KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x 14 L5x L6x L7x L8x L9x LAx LBx LCx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LPx LQx LRx LSx LTx LYx LZx M2x M3x M4x 5 M6x M9x MAx MBx MDx MEx MFx MGx MQx MRx MSx MTx MVx MWx MXx MZx N2x N3x N4x 5 N6x N7x N8x N9x NAx NOx NFx PDx PKx PLx PMx PNx PPx PQx PSx PXx Q3x Q6x Q7x Q8x Q9x 148 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea FRU Overall e 4236 CTO MBx N2x N3x N4x N5x N6x N7x N8x N9x NAx NBx NCx NDx NEx NFx NGx NHx NLx NNx NPx NRx NSx NTx NWx NXx NYx P2x P3x P4x P5x P8x P9x PCx PDx PEx PHx PJx e 4237 CTO e 4238 CTO Keyboard see Keyboard on page 154 TrackPoint caps 91P9642 Thermal grease 91P8835 ac power adapter see Information about ac power adapters on page 158 Chapter 10 Parts list 149 LCD FRUs Table 10 Parts list LCD FRUs 5 See Miscellaneous parts on page 156 LCD bezel assembly 04W1609 150 ThinkPad T420 and T420i Hardware Maintena
66. Hz 04W0494 4177 CTO 2Hx 2Jx Q7x QAx QBx QFx 4178 CTO 5Xx 5Yx 6Gx 6Wx 99 9Mx 9Sx A4x AEx AFx AWx AXx AYx 4179 CTO GRx 4180 J2x K8x KCx KFx KMx KRx L2x LAx LBx PEx PJx PQx PXx Q5x Q6x 4236 CTO N4x NDx NEx NFx NGx NPx NQx NRx NVx NWx P2x P9x PEx PKx 4237 CTO 4238 CTO CPU assembly i3 2310M 2 10 GHz 04W0495 e 4177 CTO 22x 23x 24x 26x 28x 29x 2Ax 2Bx 2Dx 2Ex 2Qx 2Rx 2Sx 2Tx 2Ux 2Xx 2 QCx QDx QGx QMx QTx QUx 4178 5Cx 5Dx 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 6Bx 6 6Hx 6Mx 6Nx 6Tx 84x 98x 9Fx 9Gx 9Hx 9Nx 9Ux 9Vx A5x A7x ADx AGx AJx AKx AUx AVx 4179 CTO G5x G6x G8x G9x GCx GDx 4180 CTO LRx LSx MAx MTx MUx MVx MWx MXx 4236 CTO NLx NXx NYx 4237 CTO 4238 CTO CPU assembly Intel Dual Core 13 2330 2 20 GHz 04W1891 4177 CTO QVx QWx QXx R9x RBx RCx RDx 4178 CTO AZx B2x B3x B4x BGx BKx BPx BQx BRx BWx BXx CDx 4179 CTO GGx GHx GMx 4180 CTO 4236 CTO PSx PTx 4237 CTO 4238 CTO CPU assembly i5 2410M 2 30 GHz 04W0496 e 4177 CTO 25x 27x 2Cx 2Kx 2Lx 2Mx 2Vx 2Wx QEx QHx QUx QKx QPx e 4178 CTO 53x 5Nx 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 66x 69x 6Kx 6Lx 6Sx 82x 83x 92x 93x 94x 95x 96x 97x 9Dx 9Ex 9Jx 9Rx 9Xx 9Yx 9Zx A2x A8x AHx AMx 4179 CTO G7x 4180 J4x LTx M3x N3x N4x N5x NCx 4236 CTO NKx P6x P7x
67. IM guide bracket sub accessory CPU bracket sub accessory SIM slide spacer SIM pull tab Sponge for RJ45 connector Sponge for display port connector Sponge for HDD 1 Sponge for HDD 2 Sponge for HDD 3 Sponge for ODD 1 Sponge for ODD 2 LCD miscellaneous parts 04W1607 LCD front bezel Rubber LCD front bezel Stopper LCD front bezel LED lens LCD front bezel Shield Clear plate LCD rear cover LED lens LCD rear cover ThinkPad logo Lenovo logo LCD latch right LCD latch left Sponge center Sponge upper Sponge lower Stopper upper right Stopper upper left Stopper lower right Stopper lower left Chapter 10 Parts list 157 Information about ac power adapters Table 13 Parts list 2 pin ac power adapters 2 pin 90 W 20 V adapter models CTO xxF xxJ xxL xxP xxS xxU xxY 4214427 2 pin 90 W 20 adapter models xxE xxF xxL xxS xxU xxY 4274431 2 pin 90 W 20 V adapter models xxF xxL xxP 5 xxU xxY 4274435 2 pin 90 20 V adapter models xxF xxJ xxL 5 xxU xxY 4274439 Table 14 Parts list 3 pin ac power adapters 3 pin 65 20 V adapter models CTO xxA xxG xxH xxQ xxT xxV 4215283 3 pin 65 20 V adapter models CTO xxA xxB xxG xxH xxK xxM xxQ xxT xxV 4274421 3 pin 65 20 V adapter models
68. KEx KFx KLx KMx L7x L8x L9x LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LPx LRx LSx LTx LUx LVx LWx LXx LYx M2x M3x M4x M5x M6x M7x M9x MCx MLx MNx MTx MUx MVx MWx N6x NCx NDx NEx PCx PDx PFx PHx PJx PTx PXx Q2x Q6x Q7x Q9x 4236 CTO 62x 64x N2x N3x N5x NCx NDx NKx NLx NMx NQx NRx NUx NXx NYx P4x 5 P6x P7x P8x P9x PCx PDx PEx PHx PJx PLx PQx PSx PTx PUx PVx PWx PXx PYx 4237 CTO e 4238 CTO LCD cable for 14 0 inch HD LCD module 04W1618 e 4177 2Kx 2Lx 2Nx 2Px 2Qx 2Yx 35x Q3x Q4x QAx QBx QFx QHx QKx QVx R4x R8x RAx RDx RKx RLx RMx RQx 4178 CTO 54x 55x 58x 59x 5Nx 5Px 5Qx 5Rx 55 5Tx 5Ux 5 5Wx 5Xx 5Zx 66x 67x 68x 6 6Kx 6Lx 6 6Rx 65 6Wx 6Xx 6Yx 82x 96x 97x 99x 9Ax 9Bx 9Cx 9Jx 9Kx 9Lx 9 9Px 9Qx 9Rx 9Sx 9 9Xx 97 2 A4x A8x A9x AFx ALx ASx AXx B8x BDx BEx BGx BJx BNx BQx BRx BSx BTx C5x C6x C7x C9x CAx CBx CEx CGx CHx CVx CWx CYx e 4179 CTO e 4180 63x 65x J2x KHx KJx KKx KPx KQx KRx KSx KTx KUx KWx KYx KZx L2x L3x L4x L5x L6x 7 M8x MBx MDx MES MFx MHx MKx MMx MPx MQx MRx MSx MYx MZx N2
69. L8x 19 LNx LPx LSx LTx LUx LVx LXx LYx LZx M2x M3x M4x M5x M6x M7x M8x MAx MBx MCx MDx MEx MFx MGx MHx MJx MKx MMx MNx MPx MQx MRx MSx MTx MUx MWx MXx MZx N2x N3x 4 N5x N6x N7x N8x N9x NBx NFx PAx PBx POx PFx PGx PHx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q3x Q4x Q5x Q6x Q7x Q8x Q9x 4236 CTO 63x MBx N2x N3x 4 N5x N8x N9x NBx NDx NEx NFx NGx NHx NKx NLx NMx NNx NPx NQx NRx NSx NTx NUx NVx NWx NYx P2x P3x 4 P5x P6x P7x P8x P9x PDx PEx PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO Bluetooth daughter card BDC 3 0 60Y3271 e 4177 22x 23x 24x 25x 29x 2Ax 2Bx 2 2Ex 2Jx 2Xx 36x GFX 60Y3275 GKx GLx GMx Q4x Q7x QAx QPx QQx QRx QSx R9x RBx ROx RFx 4178 CTO 5Ax 5Bx 5 5Dx 5Ex 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 5Nx 5Px 5Qx 5Rx 55 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 57 66x 68x 69x 6Ax 6Hx 6Jx 6 6Qx 6Rx 9 6Xx 6Yx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9 9Dx 9Ex A5x A6x A7x AJx AKx AQx ARx BDx BEx BFx BHx BJx BMx BNx BPx BQx BRx BUx BVx BWx BXx BYx BZx C2x C3x C4x CBx 4179
70. LED board on page 113 2030 Integrated camera on page 115 2040 LCD panel and LCD cable on page 117 2050 Camera cable on page 119 Removal steps of wireless LAN antenna assembly or wireless LAN WAN antenna assembly When installing When you install the antenna kit route the cables as shown in the figure above As you route the cables make sure that they are not subjected to any tension Tension could cause the cables to be damaged by the cable guides or a wire to be broken 120 ThinkPad T420 and T420i Hardware Maintenance Manual Torque 0 181 Nm 1 85 kgfcm Color Black M2 x 3 mm flat head nylon coated 2 Screw quantity Step 121 Chapter 8 Removing and replacing a FRU 2070 Hinges and LCD rear cover assembly For access remove these FRUs in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 3 2010 LCD bezel assembly on page 112 2020 LED bo
71. MM slot cover on page 9 e 1080 Keyboard on page 73 Note The FPC cable is attached on the underside of the keyboard bezel assembly In some models the Bluetooth daughter card is also attached on the underside of the keyboard bezel assembly For the models that do not have a Bluetooth daughter card skip steps EJ to Removal steps of keyboard bezel assembly FPC cable and Bluetooth daughter card cu S Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 1 Black 0 181 Nm 1 85 kgfcm BH M2 x 15 mm wafer head nylon coated 4 Black 0 181 Nm 1 85 kgfcm Chapter 8 Removing and replacing a FRU 3 Torque Screw quantity Step 1 85 kgfcm 1 85 0 181 Nm 0 181 Nm Silver coated M2 x 3 mm wafer head nylon Shoulder screw 2 84 ThinkPad T420 and T420i Hardware Maintenance Manual When installing Make sure that the connector is attached firmly Chapter 8 Removing and replacing a FRU 85 Screw quantity Torque M2 x 3 mm wafer head nylon coated 1 Black 0 181 Nm 1 85 kgfcm 86 ThinkPad T420 and T420i Hardware Maintenance Manual lt 59 When installing Make sure that the connector is attached firmly Chapter 8 Removing and replacing a FRU 87 1130 SmartCard For access remove these FRUs in order e 1010 Battery pack on page 63 1050 DIMM slot cover on page 69 1080 Keyboard on page
72. Mx Q2x Q3x Q4x Q7x Q8x QAx QBx QEx QHx QNx QPx QQx QRx QTx QUx QVx QWx QXx QYx QZx R4x R5x R6x R7x R8x R9x RAx RBx RCx RDx RFx RGx RHx RJx RKx RLx RMx RNx RPx RQx RRx RSx RTx RUx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 5Ax 5Bx 5Cx 5Dx 5Ex 5Fx 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 5 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5 5Wx 5Xx 5Yx 5Zx 66x 67x 68x 69x 6Ax 6Bx 6Cx 6Fx 6Gx 6Hx 6Jx 6Kx 6Lx 6Mx 6Nx 6Px 6Qx 6Rx 6Sx 6Ux 6Vx 6Wx 6Xx 6Zx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9 9Dx 9Ex 9Jx 9Kx 9Lx 9Mx 9 9Qx 9Sx 9Tx 9Ux 9Vx 9Wx 9Xx 9Yx 97 A2x A3x A4x A9x ABx ADx AEx AFx AGx AHx AJx AKx ALx AMx ANx APx ASx ATx AUx AVx AWx AXx AYx AZx B2x B3x B4x B5x B6x B7x B8x B9x BAx BBx BCx BDx BEx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BTx BUx BYx BZx C2x C3x 4 5 C6x C7x C8x C9x CAx CBx CCx CDx CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx CVx CWx CXx CYx 4179 CTO G3x G4x G5x G6x G7x G8x G9x GBx GOx GDx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 CTO 63x 65x J2x J3x J4x K2x K3x K4x K5x K6x K7x K8x K9x KAx KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L7x
73. NGER Bien que le voltage des batteries principales soit peu lev le court circuit ou la mise la masse d une batterie peut produire suffisamment de courant pour br ler des mat riaux combustibles ou causer des br lures corporelles graves A DANGER Si le remplacement chaud n est pas autoris pour l unit remplacable sur site que vous remplacez proc dez comme suit avant de retirer l unit mettez l ordinateur hors tension d branchez tous les cordons d alimentation des prises de courant retirez le bloc de batterie et d connectez tous les c bles d interconnexion A VORSICHT Bevor nach einem FRU Austausch der Computer wieder angeschlossen wird muB sichergestellt werden daB keine Schrauben Federn oder andere Kleinteile fehlen oder Geh use vergessen wurden Der Computer muB gesch ttelt und Klappergerausche gepr ft werden Metallteile oder splitter k nnen Kurzschl sse erzeugen A VORSICHT Die Bereitschaftsbatterie die sich unter dem Diskettenlaufwerk befindet kann geringe Mengen Nickel und Cadmium enthalten Sie darf nur durch die Verkaufsstelle oder den IBM Kundendienst ausgetauscht werden Sie darf nicht zerlegt wiederaufgeladen kurzgeschlossen oder Feuer oder Wasser ausgesetzt werden Die Batterie kann schwere Verbrennungen oder Ver tzungen verursachen Bei der Entsorgung die rtlichen Bestimmungen f r Sonderm ll beachten Beim Ersetzen der Bereitschafts oder Systembatterie nur
74. NPx NQx NRx NSx NTx NUx NVx NWx NXx NYx P2x 4 P5x P7x P8x P9x PAx PBx PCx PDx PEx PFx PGx PHx PJx PKx PLx PMx PNx PQx PRx PSx PTx PUx PVx PWx PXx PYx e 4237 CTO e 4238 CTO Keyboard bezel assembly without fingerprint reader 04W1372 4177 CTO 25x 26x 28x Q5x QDx QFx QGx QUx QLx QMx QSx R2x R3x RVx 4178 CTO 56x 57x 58x 59x 9Fx 9Gx 9Hx 9Nx 9Rx A5x A7x AAx ACx AQx ARx BVx BWx BXx 4179 CTO G2x GEx 4180 CTO 62x 64x LEx LFx LGx LHx LJx LKx LLx LMx M9x MLx NCx NDx NEx PDx PEx PJx Q2x 4236 CTO 62x 64x 65x N6x N7x 4237 CTO 4238 CTO Modem daughter card MDC 60Y3207 e 4177 CTO 22x 23x 24x 25x 29x 2Ax 2Bx 2 2 2Jx 2Xx 36x GFx GKx GLx GMx Q4x Q7x QCx QPx QQx QRx QSx R9x RBx RCx RFx 4178 CTO 5Ax 5Bx 5 5Dx 5Ex 5Gx 5Hx 5Jx 5Kx 5Lx 5Mx 5Nx 5Px 5Qx 5Rx 55 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 57 66x 68x 69x 6Ax 6Hx 6Jx 6Kx 6Qx 6Rx 9 6Xx 6Yx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9 9Dx 9Ex A5x A6x A7x AJx AKx AQx ARx BDx BEx BFx BHx BJx BMx BNx BPx BQx BRx BUx BVx BWx BXx BYx BZx C2x C3x C4x CBx 4179 CTO G2x G3x G4x G5x G6x G7x G8x G9x GOx GDx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 CTO J2x J3x J4x K2
75. P8x 4237 CTO 4238 CTO CPU assembly Intel Dual Core i5 2430M 2 40 GHz 04W1893 e 4177 CTO QYx QZx R3x R4x RAx RFx RPx RXx e 4178 CTO 5 B6x B9x BFx BJx BMx BSx BTx BUx BVx BZx 2 4 CBx 4179 CTO 4180 CTO PKx PLx PMx PNx PPx PQx 4236 CTO PHx PJx PPx PUx PVx PWx 4237 CTO 4238 CTO Chapter 10 Parts list 145 Table 9 Parts list Overall continued no FRU Overen muse 22 CPU assembly Intel Pentium B950 2 10 GHz 04W1895 e 4177 CTO GFx GKx GLx GMx 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO 22 CPU assembly Intel Pentium 8940 2 0 GHz 04W1894 e 4177 CTO QQx QRx QSx e 4178 CTO AQx ARx e 4179 e 4180 CTO e 4236 e 4237 e 4238 CTO Backup battery 02 7078 04W1642 24 SmartCard Reader FPC cable 04W1639 e 4177 2Fx 2Gx 2Hx Q7x Q8x QAx QBx QPx R9x RBx RCx RLx RMx RRx RSx RTx e 4178 5Lx 5 5 5Px 5Qx 5Rx 5Sx 5 5Ux 5Vx 5Wx 5 57 66x 67x 68x 6Bx 6 6Ex 6Fx 6Gx 6Qx 6Rx 6Xx 6Yx 6Zx 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9Cx AEx AXx AYx AZx B2x B3x 4 BDx BEx BHx BJx BMx BNx BPx BQx BRx BUx BZx C3x C4x C5x C6x CBx CFx CHx CKx CLx CMx CNx CPx CQx CYx 4179 CTO GXx 4180 CTO KEx KFx L9x LAx LB
76. PYx PZx Q3x Q4x Q5x 4236 CTO 63x 65x MBx 4 N6x N7x N8x N9x NBx NEx NFx NGx NHx NNx NSx NTx NVx P2x PFx PGx PKx PMx PNx PRx 4237 CTO 4238 CTO Hinges 04W1610 04W1612 04W1611 Wireless antenna set 04W1615 N 04W1616 LCD rear cover assembly 04W1608 LED cable with camera bracket 04 1619 N 152 ThinkPad T420 and T420i Hardware Maintenance Manual Table 10 Parts list LCD FRUs continued CRU ID LCD cable for 14 0 inch HD LCD module 04W1617 e 4177 CTO 25x 26x 27x 28x 2Dx 2Jx 2 2Rx 25 2Tx 2Ux 2Vx 2Wx 32x 33x 34x Q2x Q5x Q7x QCx QEx QGx QJx QLx QNx QPx QTx QUx QWx QXx QYx QZx R2x R3x R5x R6x R7x R9x RBx RCx RFx RGx RHx RJx RNx RPx RRx RSx RTx RUx RVx RYx RZx 4178 CTO 52x 56x 57x 5Ax 5Bx 5 5Dx 5Fx 5Gx 5Hx 5Jx 5Kx 51 5Mx 69x 6Bx 6Cx 6 6Fx 6Hx 6Jx 6 6Qx 6Tx 6Zx 83x 84x 92x 93x 94x 95x 98x 9Fx 9Gx 9Hx 9Nx 9Ux 9Vx 9Wx 9Yx A5x A7x ABx ADx AGx AHx AJx AKx AMx ANx APx ATx AUx AVx AWx AYx AZx B2x B3x B4x B5x B6x B7x B9x BAx BBx BCx BKx BPx BVx BWx BYx BZx C2x C3x 4 CCx CDx CFx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx CXx e 4179 CTO G2x G3x G4x G5x G6x G7x GEx GQx GRx GVx GWx e 4180 62x 64x K2x K3x K4x K5x K6x K7x K8x K9x KAx KCx KDx
77. RGx RHx RJx RKx RLx RMx RNx RPx RQx RRx RSx RTx RUx RVx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 56x 57x 58x 59x 5Ax 5Bx 5Cx 5Dx 5Ex 5Gx 5Hx 5Jx 5 5Lx 5Mx 5Nx 5Px 5Qx 5Rx 55 51 5Ux 5Vx 5Wx 5Xx 5Yx 57 66x 67x 68x 69x 6 6Cx 6 6Hx 6Jx 6Kx 6Mx 6 6Px 6Qx 6Rx 6Sx 6Ux 6 6Wx 6Xx 6Yx 6Zx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9 9 9 9Dx 9 9Fx 9Gx 9Hx 9Jx 9Kx 91 9Mx 9Nx 9Px 9Qx 9Rx 9Sx 9Tx 9Ux 9Vx 9Wx 9Xx 9Yx 97 A2x A3x A4x A5x A6x A7x A8x 9 AAx ADx AEx AFx AGx AJx ALx AMx ANx AQx ARx ASx ATx AUx AVx AWx AXx AYx AZx B2x B3x B4x B5x B6x B7x B8x B9x BAx BBx BCx BDx BEx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BTx BUx BVx BWx BXx BYx BZx 2 C3x 4 C5x C6x C7x C8x C9x CAx CBx CCx CDx CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx CVx CWx 4179 CTO G2x G3x G4x G5x G6x G8x G9x GBx GCx GDx GEx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 CTO 62x 63x 64x 65x J2x J3x 44 K2x K3x K4x K5x K6x K7x K8x K9x KAx KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KWx KXx KYx KZx L2x L3x 14 L5
78. SD on page 66 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 1170 Fan assembly on page 97 1180 CPU on page 101 1190 Base cover assembly and DC in connector cable on page 102 Important notices for handling the system board When handling the system board bear the following in mind The system board has an accelerometer which can be broken by applying several thousands of G forces Note Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject the accelerometer to as much as 6 000 G s of shock Be careful not to drop the system board on a bench top that has a hard surface such as metal wood or composite If a system board is dropped you must test it using PC Doctor for DOS to make sure that the HDD Active Protection System still functions Note If the test shows that HDD Active Protection System is not functioning be sure to document the drop in a reject report and replace the system board Avoid rough handling of any kind At every point in the process be sure not to drop or stack the system board If you put a system board down be sure to put it only on a padded surface such as an ES
79. System CMOS checksum bad Default configuration used 0271 Real time clock error Check date and time settings 1802 Unauthorized network card is plugged in Turn off and remove the network card 1820 More than one external fingerprint reader is attached Power off and remove all but the reader that you set up within your main operating system 2000 Hard Drive Active Protection sensor diagnostics failed Press Esc to continue Press F1 to enter SETUP 2100 Detection error on HDDO Main HDD 2101 Detection error on HDD1 Ultrabay HDD 2102 Detection error on HDD2 Mini SATA 2110 Read error on HDDO Main HDD 2111 Read error on HDD1 Ultrabay HDD 2112 Read error on HDD2 Mini SATA 2200 Machine Type and Serial Number are invalid 2201 Machine UUID is invalid 44 ThinkPad T420 and T420i Hardware Maintenance Manual FRU or action in sequence Run the ThinkPad Setup program and then save current setting by pressing F10 System board Run the ThinkPad Setup program and then save the current setting by pressing F10 System board Charge the backup battery for more than 8 hours by connecting the ac power adapter Replace the backup battery and run the ThinkPad setup program to reset the time and date Run the ThinkPad Setup program to reset the time and date 1 2 Remove Mini PCI network System board Remove all but the reader that
80. T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea DI ETT 4 GB DDR3 1333 SDRAM SO DIMM PC3 10600 card 55Y3717 e 4177 27x 29x 2Ax 2Bx 2 2Hx 2Jx 2Kx 2Lx 2 2Nx 2Px 2Sx 2 2Ux 2 2Wx 2Yx 32x 33x 34x 35x Q5x QBx QDx QFx QGx QHx QJx QKx QLx QMx ONS QPx QUx ONS QWx QXx QYx QZx R2x R3x R4x R7x R8x RAx RBx RCx RDx RFx RGx RHx RJx RKx RLx RMx RPx RQx RRx RSx RTx RVx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 5 5Nx 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 5Zx 67x 68x 69x 6 6Cx 6Ex 6Fx 6Gx 6Hx 6Kx 6Lx 6Px 6Qx 6Rx 6Ux 6Vx 6Wx 6Xx 6Yx 67 82x 93x 95x 99x 9Ax 9 9 9Rx 95 9 9Wx 9 9Yx 9Zx A2x A4x A8x 9 AEx AFx APx AWx AZx B2x B3x B4x B5x B6x B7x B8x B9x BAx BDx BEx BFx BHx BJx BMx BNx BPx BQx BRx BSx BTx BUx BVx BWx BXx BYx BZx 2 C3x C4x C5x C7x C8x C9x CAx CBx CCx CEx CFx CGx CHx CJx CKx CLx CMx CPx CQx CRx CSx CUx CVx CWx CXx CYx 4179 GBx GMx GNx GRx GXx 4180 CTO K2x K4x K5x K8x K9x KAx KBx KCx KDx KEx KFx KGx KHx KJx KKx KLx KMx KPx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L7x L8x L9x LAx LBx LPx LQx LXx LYx
81. ThinkPad ThinkPad 1420 and 1420i Hardware Maintenance Manual Note Before using this information and the product it supports be sure to read the general information under Appendix A Notices on page 167 Fourth Edition November 2011 O Copyright Lenovo 2011 LIMITED AND RESTRICTED RIGHTS NOTICE If data or software is delivered pursuant a General Services Administration GSA contract use reproduction or disclosure is subject to restrictions set forth in Contract No GS 35F 05925 Contents About this manual Chapter 1 Safety information General safety Electrical safety Safety inspection guide Handling devices that are sensitive to dlecttosfatic discharge Grounding requirements Safety notices multilingual Laser compliance statement multilingual translations aires EN E Chapter 2 Important service information Strategy for replacing FRUS Strategy for replacing a hard disk dili Important notice replacing a system board Seed NP How to use error message for FRUs for CTO CMV rd GAV Prodi t definition FRU identification for CTO CMV and GAV products Chapter 3 General checkout What to do first Checkout guide Diagnostics using PC Deter ior DOS Lenovo ThinkVantage Toolbox FRU tests Power system checkout Checking the ac power adapter Checking operational charging Checking the battery pack Checking th
82. U 105 1200 Magnesium structure frame For access remove these FRUs in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1030 Serial Ultrabay Enhanced device or travel bezel on page 65 1040 Hard disk drive HDD and solid state drive SSD on page 66 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 1170 Fan assembly on page 97 1180 CPU on page 101 1190 Base cover assembly and DC in connector cable on page 102 Removal steps of magnesium structure frame Step Screw quantity Torque M2 x 5 mm wafer head nylon coated 2 0 181 Nm 1 85 kgfcm 106 ThinkPad T420 and T420i Hardware Maintenance Manual M2 8 mm wafer head nylon coated 2 Black 0 181 Nm 1 85 kgfcm Hex stud nylon coated 2 Silver 0 392 Nm 4 0 kgfcm Chapter 8 Removing and replacing a FRU 107 1210 System board and ExpressCard slot assembly For access remove these FRUs in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1030 Serial Ultrabay Enhanced device or travel bezel on page 65 1040 Hard disk drive HDD and solid state drive S
83. a network drive before you start the recovery process To restore the computer to the original factory configuration using the recovery disc set do the following Note Recovery can take one to two hours to complete The length of time depends on the method you use If you use recovery discs the recovery process will take about two hours 1 Make the CD DVD drive the first startup device in the startup sequence using the following procedure a Press and hold down the F1 key and then turn on the computer When the logo screen is displayed or if you hear repeating beeps release the F1 key The ThinkPad Setup program opens b Use the arrow keys to select Startup gt Boot Select the CD DVD drive as the 1st Boot Device O Copyright Lenovo 2011 37 2 Insert the Operating System Recovery Disc into the DVD drive 3 Press F10 to save the ThinkPad Setup program configuration changes Follow the instructions on the screen to begin the recovery process 4 Select your language and click Next 5 Read the license If you agree with the terms and conditions select accept these terms and conditions and then click Next If you do not agree with the terms and conditions follow the instructions on the screen 6 Click Yes in the displayed window to begin the operating system recovery process 7 Insert the Applications and Drivers Recovery Disc when prompted and then click OK to begin the applications and drivers recovery process
84. age 3 Removal steps of speaker assembly Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 3 0 181 Nm 1 85 kgfcm Chapter 8 Removing and replacing a FRU 91 When installing Attach the speaker assembly and route the cable as shown in the following figure and make sure that the speaker connector 15 attached firmly U ES O DO J O o 2 ES er lof Sade OLY O e am 92 ThinkPad T420 T420i Hardware Maintenance Manual 1160 LCD unit For access remove these FRUS in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 Removal steps of LCD unit S Step Screw quantity Torque M2 5 x 6 mm wafer head nylon coated 2 Black 0 392 Nm 4 0 kgfcm Chapter 8 Removing and replacing FRU 93 To
85. age 63 1050 DIMM slot cover on page 9 1080 Keyboard on page 73 Note Your computer has two DIMM slots one under the keyboard and another on the underside of the computer If you install a DIMM in only one of the two slots install it in the slot located under the keyboard Removal steps of DIMM in the slot under the keyboard Chapter 8 Removing and replacing a FRU 77 When installing Insert the notched end of the DIMM into the socket Press the DIMM firmly and pivot it until it snaps into place Make sure that it is firmly fixed the slot and does not move easily 78 ThinkPad T420 and T420i Hardware Maintenance Manual 1100 Backup battery For access remove these FRUS in order e 1010 Battery pack on page 63 1050 DIMM slot cover on page 9 1080 Keyboard on page 73 Removal steps of backup battery Awer Use only the battery specified in the parts list for your computer Any other battery could ignite or explode Cable routing Attach the backup battery and route the cable as shown in the figure below and make sure that the battery connector 15 attached firmly Chapter 8 Removing and replacing FRU 79 80 ThinkPad T420 and T420i Hardware Maintenance Manual 1110 PCI Express Mini Card for wireless LAN For access remove these FRUS in order e 1010 Battery pack on page
86. agem A PERIGO Para evitar choque el trico n o remova a capa pl stica que protege a parte inferior da placa inversora A PERIGO 8 ThinkPad T420 and T420i Hardware Maintenance Manual Embora as principais baterias possuam baixa voltagem uma bateria em curto circuito ou aterrada pode produzir corrente o bastante para queimar materiais de pessoal ou inflam veis A PERIGO A menos que uma hot swap seja permitida para a FRU que est sendo substituida fa a o seguinte antes de remov la desligue o computador desconecte todos os cabos de energia das tomadas remova o pacote de baterias e desconecte quaisquer cabos de interconex o A DANGER Avant de remettre l ordinateur sous tension apr s remplacement d une unit en client le v rifiez que tous les ressorts vis et autres pi ces sont bien en place et bien fix es Pour ce faire secouez l unit et assurez vous qu aucun bruit suspect se produit Des pi ces m talliques ou des copeaux de m tal pourraient causer un court circuit A DANGER Certaines batteries de secours contiennent du nickel et du cadmium Ne les d montez pas ne les rechargez pas ne les exposez ni au feu ni l eau Ne les mettez pas en court circuit Pour les mettre au rebut conformez vous la r glementation en vigueur Lorsque vous remplacez la pile de sauvegarde ou celle de l horloge temps r el veillez a n utiliser que les mod les cit s dans la liste de piece
87. am The user must enter the SVP in order to get access to the ThinkPad Setup program and change the system configuration Attention If the SVP has been forgotten and cannot be made available to the service technician there is no service procedure to reset the password The system board must be replaced for a scheduled fee How to remove the power on password To remove a POP that you have forgotten do the following A If no SVP has been set 1 Turn off the computer 2 Remove the battery pack For how to remove the battery pack see 1010 Battery pack on page 63 3 Remove the backup battery For how to remove the backup battery see 1100 Backup battery on page 79 4 Turn on the computer and wait until the POST ends After the POST ends the password prompt does not appear The POP has been removed 5 Reinstall the backup battery and the battery pack B If an SVP has been set and is known by the service technician 1 Turn on the computer 2 When the ThinkPad logo comes up immediately press F1 to enter the ThinkPad Setup program When the POP icon is appearing on the screen enter the POP Select Security using the cursor directional keys to move the menu Select Password Select Power On Password Type the current SVP in the Enter Current Password field then leave the Enter New Password field blank and press Enter twice 7 Inthe Changes have been saved window press Enter oa 8 Pres
88. ansmitted Device access E Data is being read from or written to the hard disk drive the diskette drive or the drive in the Serial Ultrabay Enhanced device When this indicator is on do not put the computer into sleep standby mode or turn off the computer Note Do not move the system while the green device access light is on Sudden physical shock could cause drive errors 50 ThinkPad T420 and 420 Hardware Maintenance Manual Table 7 Status indicators continued Power on Numeric lock On screen indicator ay Serial Ultrabay Enhanced device status Caps lock CapsLk Battery status h The computer is on and ready to use This indicator stays lit around the power on button whenever the computer is on and is not in sleep standby mode Note This indicator blinks when the computer is in sleep mode By default when the numeric lock is on the numeric lock indicator is displayed on the screen Green A Serial Ultrabay Enhanced device is installed and in use Blinking green A Serial Ultrabay Enhanced device is in the process of being detached Turn off A Serial Ultrabay Enhanced device is ready to be attached or detached Caps Lock mode is enabled To enable or disable Caps Lock mode press the Caps Lock key Green The battery charge level is 20 or higher Orange The battery charge level is between 5 and 20 Fast blinking orange The battery charge level is lower
89. ard on page 113 2030 Integrated camera on page 115 2040 LCD panel and LCD cable on page 117 2050 Camera cable on page 119 2060 Wireless LAN antenna assembly or wireless LAN WAN antenna assembly on page 120 Removal steps of hinges and LCD rear cover assembly Step Screw quantity Torque M2 5 x 4 mm wafer head nylon coated 4 Black 0 392 Nm 4 0 When installing Attach the hinges as shown in the following figure 122 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 8 Removing and replacing FRU 123 124 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 9 Locations This chapter presents the locations of ThinkPad T420 and T420i hardware components Front view Integrated camera for some models ThinkLight Built in microphone Built in speakers Security keyhole Universal serial bus USB eSATA combo connector USB connector Media Card Reader slot ExpressCard slot Serial Ultrabay Enhanced drive or travel bezel 2 Combo audio jack Fingerprint reader Touch pad buttons Touch pad TrackPoint buttons TrackPoint pointing stick UltraNav Volume control buttons ThinkVantage button Power switch 25 KERGED N ran Status indicators Note For the description of each indicator see Chapter 5 Status indicators on page 49 O Copyright Lenovo 2011 125 126 ThinkPad T420 and T420i Hardware Mai
90. are Maintenance Manual Chapter 3 General checkout This chapter presents following information What to do first on page 28 Checkout guide on page 29 Diagnostics using PC Doctor for DOS on page 29 Lenovo ThinkVantage Toolbox on page 31 FRU tests on page 33 e Power system checkout on page 34 The descriptions this chapter apply to any ThinkPad model that supports the PC Doctor for DOS diagnostics program Some descriptions might not apply to your particular computer Before you go to the checkout guide be sure to read the following important notes Important notes Only certified trained personnel should service the computer Before replacing any FRU read the entire page on removing and replacing FRUs When you replace FRUs use new nylon coated screws Be extremely careful during such write operations as copying saving or formatting Drives in the computer that you are servicing sequence might have been altered If you select an incorrect drive data or programs might be overwritten Replace a FRU only with another FRU of the correct model When you replace a FRU make sure that the model of the machine and the FRU part number are correct by referring to the FRU parts list A FRU should not be replaced because of a single unreproducible failure Single failures can occur for a variety of reasons that have nothing to do with a hardware defect such as cosmic radiation electrostati
91. assword prompt does not appear when the operating system is booted Power on password A power on password POP protects the system from being powered on by an unauthorized person The password must be entered before an operating system can be booted For how to remove the POP see How to remove the power on password on page 39 Hard disk password There are two hard disk passwords HDPs e User HDP for the user e Master HDP for the system administrator who can use it to get access to the hard disk even if the user has changed the user HDP Note There are two modes for the HDP User only and Master User The Master User mode requires two HDPs the system administrator enters both in the same operation The system administrator then provides the user HDP to the system user 38 ThinkPad T420 and T420i Hardware Maintenance Manual Attention If the user HDP has been forgotten check whether a master HDP has been set If it has it can be used for access to the hard disk drive If no master HDP is available neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master HDP or to recover data from the hard disk drive The hard disk drive can be replaced for a scheduled fee For how to remove the POP see How to remove the hard disk password on page 39 Supervisor password A supervisor password SVP protects the system information stored in the ThinkPad Setup progr
92. been set on the timer and if the user does not do any operation with the keyboard the TrackPoint the hard disk drive the parallel connector or the diskette drive within that time e f the timer conditions are satisfied in suspend mode When the power is turned on the computer returns from hibernation mode and resumes operation The hibernation file in the boot record on the hard disk drive is read and system status is restored from the hard disk drive 42 ThinkPad T420 and 420 Hardware Maintenance Manual Symptom to FRU index This section contains following information Numeric error codes on page 43 Error messages on page 45 Beep symptoms on page 46 No beep symptoms on page 46 LCD related symptoms on page 46 Intermittent problems on page 48 Undetermined problems on page 48 The symptom to FRU index in this section lists symptoms and errors and their possible causes The most likely cause 15 listed first in boldface type Note Do the FRU replacement or other actions in the sequence shown in the column headed FRU or action in sequence If replacing a FRU does not solve the problem put the original part back in the computer Do not replace a nondefective FRU This index can also help you determine during regular servicing what FRUs are likely to need to be replaced next A numeric error is displayed for each error detected in POST or system operation In the displays n
93. ble it throw it into fire or water or short circuit it Dispose of the battery pack as required by local ordinances or regulations Use only the battery in the appropriate parts listing when replacing the battery pack Use of an incorrect battery can result in ignition or explosion of the battery A DANGER The lithium battery can cause a fire an explosion or a severe burn Do not recharge it remove its polarized connector disassemble it heat it above 100 C 212 F incinerate it or expose its cell contents to water Dispose of the battery as required by local ordinances or regulations Use only the battery in the appropriate parts listing Use of an incorrect battery can result in ignition or explosion of the battery Chapter 1 Safety information 5 DANGER If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands immediately wash the affected areas with water for at least 15 minutes Seek medical care if any symptoms from the fluid are present after washing A DANGER To avoid shock do not remove the plastic cover that protects the lower part of the inverter card DANGER Though the main batteries have low voltage a shorted or grounded battery can produce enough current to burn personnel or combustible materials A DANGER Unless hot swap is allowed for the FRU being replaced do as follows before removing it power off the computer unplug all power cords from electrical
94. c discharge or software errors Consider replacing a FRU only when a problem recurs If you suspect that a FRU is defective clear the error log and run the test again If the error does not recur do not replace the FRU Be careful not to replace a nondefective FRU Copyright Lenovo 2011 27 What to do first When you do return a FRU you must include the following information in the parts exchange form parts return form that you attach to it Name and phone number of service technician Date of service Date on which the machine failed Date of purchase Failure symptoms error codes appearing on the display and beep symptoms Procedure index and page number in which the failing FRU was detected Failing FRU name and part number Machine type model number and serial number Customer s name and address Note During the warranty period the customer may be responsible for repair costs if the computer damage was caused by misuse accident modification unsuitable physical or operating environment or improper maintenance by the customer Following is a list of some common items that are not covered under warranty and some symptoms that might indicate that the system was subjected to stress beyond normal use Before checking problems with the computer determine whether the damage is covered under the warranty by referring to the following list The following are not covered under warran
95. can be any number If no numeric code is displayed check the narrative descriptions of symptoms If the symptom is not described there go to Intermittent problems on page 48 Note For a device not supported by diagnostic codes in the ThinkPad Notebooks see the manual for that device Numeric error codes Table 2 Numeric error codes Symptom or error FRU or action in sequence 0177 System board Bad SVP data stop POST task The checksum of the supervisor password in the EEPROM is not correct 0182 1 Run the ThinkPad Setup program Press F9 and Bad CRC2 Enter the ThinkPad Setup program and load Enter to load the default setting Then save the Setup defaults The checksum of the CRS2 setting in current setting by pressing F10 the EEPROM is not correct 2 System board 0183 Bad CRC of Security Settings in Variable Enter the ThinkPad Setup program 0187 System board EAIA data access error The access to EEPROM is failed 0188 System board Invalid RFID Serialization Information Area 0189 System board Invalid RFID configuration information area The EEPROM checksum is not correct 0190 1 Charge the battery pack Critical low battery error 2 Battery pack Chapter 4 Related service information 43 Table 2 Numeric error codes continued Symptom or error 0191 System Security Invalid Remote Change requested 0199 System Security Security password retry count exceeded 0251
96. ce information 45 Beep symptoms Table 4 Beep symptoms Symptom or error FRU or action in sequence One beep and a blank unreadable or flashing LCD Reseat the LCD connector LCD assembly External CRT System board One long and two short beeps and a blank or unreadable System board LCD LCD assembly DIMM Two short beeps with error codes POST error See Numeric error codes on page 43 Two short beeps and a blank screen 1 System board 2 DIMM Two or more beeps or a continuous beep Operating If a mini PCI Ethernet card is installed confirm that Alert system starts successfully On LAN 2 in the ThinkPad Setup program is disabled Three short beeps pause three more short beeps and 1 DIMM one short beep 2 System board One short beep pause three short beeps pause three more short beeps and one short beep Only the cursor appears Reinstall the operating system Four cycles of four short beeps and a blank screen System board security chip Five short beeps and a blank screen System board No beep symptoms Table 5 No beep symptoms Symptom or error FRU or action in sequence No beep power on indicator on LCD blank and no 1 Make sure that every connector is connected POST tightly and correctly 2 DIMM 3 System board No beep power on indicator on and LCD blank during 1 Reseat DIMM POST 2 System board The power on password prompt appears A power on password or
97. ces on page 57 3 Begin by removing any FRUs that have to be removed before replacing the failing FRU Any such FRUs are listed at the top of each FRU replacement page Remove them in the order in which they are listed 4 Follow the correct sequence in the steps for removing a FRU as given in the drawings by the numbers in square callouts 5 When turning a screw to replace a FRU turn it in the direction as given by the arrow in the drawing 6 When removing a FRU move it in the direction as given by the arrow in the drawing 7 To put the new FRU in place reverse the removal procedure and follow any notes that pertain to replacement For information about connecting and arranging internal cables see Chapter 9 Locations on page 125 8 When replacing a FRU use the correct screw s as shown in the procedures bancer Before removing any FRU turn off the computer unplug all power cords from electrical outlets remove the battery pack and then disconnect any interconnecting cables Attention After replacing a FRU do not turn on the computer until you have made sure that all screws springs and other small parts are in place and none are loose inside the computer Verify this by shaking the computer gently and listening for rattling sounds Metallic parts or metal flakes can cause electrical short circuits Attention The system board is sensitive to and can be damaged by electrostatic discharge Before touching it
98. der control When you press this combination a panel for selecting a power plan power scheme appears Notes To use this combination of the keys ThinkPad PM device driver must have been installed on the computer If you have logged on with an administrator user ID in Windows XP and you press Fn F3 the panel for selecting a power scheme appears If you have logged on with another user ID in Windows XP and you press Fn F3 the panel does not appear Fn F4 Put the computer in sleep standby mode To return to normal operation press the Fn key only without pressing a function key Notes To use this combination of the keys ThinkPad PM device driver must have been installed on the computer If you want to use the combination to put the computer into hibernation mode or do nothing mode in Windows XP shut the computer down or show the panel for turning off the computer change the settings in the Power Manager Fn F5 Enable or disable the built in wireless networking features If you press Fn F5 a list of wireless features is displayed You can quickly change the power state of each feature in the list Notes If you want to use Fn F5 to enable or disable the wireless features the following device drivers must be installed on the computer beforehand e Power Management driver OnScreen Display Utility e Wireless device drivers Fn F6 Change the camera and audio settings When you press Fn F6 the camera and audio setting window is ope
99. e Never remove the drive while the system is operating or is in suspend mode Removal steps of hard disk drive and solid state drive Note Loosen the screw El but do not remove it Step Screw quantity Torque Capture screw 1 Black 0 181 Nm 1 85 kgfcm 66 ThinkPad T420 and T420i Hardware Maintenance Manual For HDD and HDD rubber rails 9 5 mm For HDD and HDD rubber rails 7 0mm For SSD and spacers Chapter 8 Removing and replacing FRU 67 When installing Make sure that 550 spacers HDD rubber rails are attached firmly 68 ThinkPad T420 and T420i Hardware Maintenance Manual 1050 DIMM slot cover For access remove this FRU e 1010 Battery pack on page 63 Removal steps of DIMM slot cover Note Loosen the screw El but do not remove it Chapter 8 Removing and replacing FRU 69 1060 DIMM in the slot on the underside of the computer For access remove these FRUs in order e 1010 Battery pack page 63 1050 DIMM slot cover on page 69 Note Your computer has two DIMM slots one under the keyboard and another on the underside of the computer If you install a DIMM in only one of the two slots install in the slot located under the keyboard Removal steps of DIMM in the slot on the underside of the computer gt 2 2
100. e 7120 AN row 295279 ab wv Class N Class maa 375 27177 a xa DYLAN 777 wean YS nur wean N mp THAT UNS np 12792 po nun DADA DIRT DDYN ih CD ROM DVD F377 7 1 327 12115147 C EMO SBA FEW gt 2 3 8 H e E 77 7787 ARAUAZ LDN 5 CORB IL HO ERA AE CHESNKARUNO BIOS ME ELIAS VD U BH 50 3 4 Nr 9 7 8061 7 9 3272132 5 5 Y 14 F i X3 200 51 3 gt 88 52 1 27 90012113 9 0 AFERRA Ho TERAV BRBOST LIMITS RSV 20 ThinkPad T420 and T420i Hardware Maintenance Manual A 32 deal AZ CD ROM DVD 2 o 242 33 SE 2417 9 331501 JE A AT Foss 3x33 BAS AAA HYAL ANA AEA gas aa Saba 250 9349 RUT FA 87 Sal 81 81141 S up amp ella 31548 099 e x Hs 233840 3o FEF 4 ALS 394 29 WS A az UP Hola AFL FAA EE Bay dell de gt EFA 4 GS FIARE fro ape QAE duas PIP 24 SE 3 Bas Ag BA 2340 FES PRECAUCI N Cuando haya instalados productos l ser por ejemplo unidades de CD ROM unidades de DVD dispositivos de fibra ptica o transmisores tenga en cuenta lo siguiente ga sop FYE A dig
101. e backup battery Chapter 4 Related service information PEE Restoring the factory contents 2 using Recovery Disc Set Passwords T Power on password Hard disk password Supervisor password How to remove the power on SEO How to remove the hard disk password Copyright Lenovo 2011 sch 17 23 23 23 24 24 25 25 25 27 28 29 29 31 33 34 34 34 35 35 37 37 38 38 38 39 39 39 Power management Screen blank mode Sleep standby mode Hibernation mode Symptom to FRU index Numeric error codes Error messages Beep symptoms No beep symptoms LCD related symptoms Intermittent problems Undetermined problems Chapter 5 Status indicators Chapter 6 Fn key combinations Chapter 7 FRU replacement notices Screw notices Retaining serial numbers Restoring the serial number bf the unit Retaining the UUID Reading or writing the information 2 Ee and p a FRU Before servicing ThinkPad 1420 ad T4201 1010 Battery pack 1020 ExpressCard blank bezel 1030 Serial 900980 Enhanced device or fave bezel 1040 Hard disk s HDD and solid state SSD 1050 DIMM slot cover 1060 DIMM in the slot on the hderside of the computer 1070 PCI Express Mini tor less WAN 1080 1090 DIMM in the slot inder thie keyboard 1100 Backup battery 1110
102. enovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you Any references in this publication to non Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites The materials at those Web sites are not part of the materials for this Lenovo product and use of those Web sites is at your own risk Any performance data contained herein was determined in a controlled environment Therefore the result obtained in other operating environments may vary significantly Some measurements may have been made on development level systems and there is no guarantee that these measurements will be the same on generally available systems Furthermore some measurements may have been estimated through extrapolation Actual results may vary Users of this document should verify the applicable data for their specific environment Copyright Lenovo 2011 167 Electronic emissions notices For electronic emission information on Class B digital devices refer to the corresponding information in the User Guide 168 ThinkPad T420 and T420i Hardware Maintenance Manual 5 The following terms are trademarks of Lenovo in the United States other countries or both Active Protection System Lenovo ThinkLight ThinkPad ThinkVantage TrackPoint Ultrabay The following terms are trademarks of M
103. eplacing a FRU External CRU statement to customers Some problems with your product can be resolved with a replacement part you can install yourself called a Customer Replaceable Unit or CRU Some CRUs are designated as Self service CRUs and others are designated as Optional service CRUs Installation of Self service CRUs is your responsibility you may request that Lenovo installs an Optional service CRU according to the warranty service for your product Where you are installing the CRU Lenovo will ship the CRU to you CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request You may find a list of CRUs in the publications that ship with your product or at http www lenovo com CRUs You may be required to return the defective part that is replaced by the CRU When return is required 1 return instructions a prepaid shipping label and a container will be included with the replacement CRU and 2 you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty 80 days of your receipt of the replacement CRU See your Lenovo Limited Warranty documentation for full details Be sure to observe the following general rules 1 Do not try to service any computer unless you have been trained and certified An untrained person runs the risk of damaging parts 2 Before replacing any FRU review Chapter 7 FRU replacement noti
104. er to tighten e e e e Each one should be used only once Do the following when you service this machine Keep the screw kit for the P N see Miscellaneous parts on page 156 in your tool bag e Always use new screws Usea torque screwdriver if you have one Tighten screws as follows Plastic to plastic Turn an additional 90 degrees after the screw head touches the surface of the plastic part 90 degrees more A Cross section Logic card to plastic Turn an additional 180 degrees after the screw head touches the surface of the logic card O Copyright Lenovo 2011 57 180 degrees more Cross section e Torque driver If you have a torque driver refer to the Torque column for each step e Make sure that you use the correct screw If you have a torque screwdriver tighten all screws firmly to the torque shown in the table Never use a screw that you removed Use a new one Make sure that all of the screws are tightened firmly e Ensure torque screw drivers are calibrated correctly following country specifications Retaining serial numbers This section includes the following descriptions e Restoring the serial number of the system unit on page 58 e Retaining the UUID on page 59 e Reading or writing the ECA information on page 59 Restoring the serial number of the system unit When the computer was manufactured the E
105. error code may also cause false error codes If no error code is displayed see whether the error symptom is listed in the Symptom to FRU Index for the computer you are servicing 24 ThinkPad T420 and T420i Hardware Maintenance Manual Strategy for replacing FRUs for CTO CMV and GAV Product definition Dynamic Configure To Order CTO This provides the ability for a customer to configure a Lenovo solution from an eSite and have this configuration sent to fulfillment where it is built and shipped directly to the customer The machine label Product Entitlement Warehouse PEW eSupport and the HMM will load these products as the 4 digit MT and 3 digit model where model CTO Example 1829 CTO Custom Model Variant CMV This is a unique configuration that has been negotiated between Lenovo and the customer A unique 4 digit MT and 3 digit model is provided to the customer to place orders Example 1829 W15 A CMV is a special bid offering Therefore it is NOT generally announced The MTM portion of the machine label is the 4 digit MT and 3 digit model where model CTO Example 1829 CTO The PRODUCT ID portion of the machine label is the 4 digit MT and 3 digit CMV model Example 1829 W15 The PEW record is the 4 digit MT and 3 digit model where model CTO Example 1829 CTO eSupport will show both the CTO and CMV machine type models Example 1829 CTO and 1829 W15 will be found on the eSuppo
106. es After service reinstall all safety shields guards labels and ground wires Replace any safety device that is worn or defective Reinstall all covers correctly before returning the machine to the customer Fan louvers on the machine help to prevent overheating of internal components Do not obstruct fan louvers or cover them with labels or stickers Copyright Lenovo 2011 1 Electrical safety Observe the following rules when working on electrical equipment Important Use only approved tools and test equipment Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents Many customers have near their equipment rubber floor mats that contain small conductive fibers to decrease electrostatic discharges Do not use this type of mat to protect yourself from electrical shock e Find the room emergency power off EPO switch disconnecting switch or electrical outlet If an electrical accident occurs you can then operate the switch or unplug the power cord quickly Do not work alone under hazardous conditions or near equipment that has hazardous voltages e Disconnect all power before Performing a mechanical inspection Working near power supplies Removing or installing main units Before you start to work on the machine unplug the power cord If you cannot unplug it ask the customer to power off the wall box that supplies power to t
107. f the object equally between your feet Use a slow lifting force Never move suddenly or twist when you attempt to lift N a Lift by standing by pushing up with your leg muscles this action removes the strain from the muscles in your back Do not attempt to lift any object that weighs more than 16 kg 35 Ib or that you think is too heavy for you Do not perform any action that causes hazards to the customer or that makes the equipment unsafe Before you start the machine make sure that other service technicians and the customer s personnel are not in a hazardous position Place removed covers and other parts in a safe place away from all personnel while you are servicing the machine Keep your toolcase away from walk areas so that other people will not trip over it Do not wear loose clothing that can be trapped in the moving parts of a machine Make sure that your sleeves are fastened or rolled up above your elbows If your hair is long fasten it Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip about 8 centimeters 3 inches from the end Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Attention Metal objects are good electrical conductors Wear safety glasses when you are hammering drilling soldering cutting wire attaching springs using solvents or working in any other conditions that might be hazardous to your ey
108. g ThinkPad products ThinkPad 1420 T420i Machine Type 4177 4178 4179 4180 4236 4237 and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot problems Important This manual is intended only for trained service technicians who are familiar with ThinkPad products Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively Before servicing a ThinkPad product be sure to read all the information under Chapter 1 Safety information on page 1 and Chapter 2 Important service information on page 23 O Copyright Lenovo 2011 iii iv ThinkPad T420 and 420 Hardware Maintenance Manual Chapter 1 Safety information This chapter presents following safety information that you need to be familiar with before you service a ThinkPad Notebook General safety on page 1 Electrical safety on page 2 Safety inspection guide on page 3 Handling devices that are sensitive to electrostatic discharge on page 3 Grounding requirements on page 4 Safety notices multilingual translations on page 5 Laser compliance statement multilingual translations on page 17 General safety Follow these rules to ensure general safety Observe good housekeeping in the area of the machines during and after maintenance When lifting any heavy object Make sure that you can stand safely without slipping Distribute the weight o
109. g or attaching an ac power adapter To change the default brightness level change the settings of the Power Option in the Control Panel or use the Power Manager The computer display becomes dimmer The purpose of this method is to change the brightness level temporarily On Windows Vista the default brightness level is loaded after sleep standby hibernation reboot or detaching or attaching an ac power adapter To change the default brightness level change the settings of the Power Option in the Control Panel or use the Power Manager Fn Spacebar Enable the Full Screen Magnifier function 54 ThinkPad T420 and T420i Hardware Maintenance Manual Table 8 Fn key combinations continuea Fn PrtSc Have the same function as the SysRq key Fn ScrLk Enable or disable the numeric keypad The indicator of numeric lock will be displayed on the screen Fn Pause Have the same function as the Break key Fn cursor keys These key combinations work with Windows Media Player They have the following functions e Fn down arrow key Play or Pause e Fn up arrow key Stop e Fn right arrow key Next Track e Fn left arrow key Previous Track Chapter 6 Fn key combinations 55 56 ThinkPad T420 T420i Hardware Maintenance Manual Chapter 7 FRU replacement notices This chapter presents notices related to removing and replacing parts Read this chapter carefully before replacing any FRU External CRU statement to customers
110. g the covers of the laser product could result in exposure to hazardous laser radiation There are no serviceable parts inside the device Use of controls or adjustments performance of procedures other than those specified herein might result in hazardous radiation exposure Ac Some laser products contain an embedded Class or Class laser diode Note the following Laser radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposure to the beam Chapter 1 Safety information 17 A CD ROM DVD o Class Class
111. he drive or apply any physical shock to it The drive is sensitive to physical shock Improper handling can cause damage and permanent loss of data Before removing the drive have the user make a backup copy of all the information on it if possible Never remove the drive while the system is operating or is in suspend mode 110 ThinkPad T420 and T420i Hardware Maintenance Manual Removal steps of mSATA solid state drive Step Screw quantity Torque M2 x 3 mm wafer head nylon coated 1 Black 0 181 Nm 1 85 Chapter 8 Removing and replacing a FRU 111 2010 LCD bezel assembly For access remove the following FRU 1010 Battery pack on page 63 Removal steps of LCD bezel assembly 112 ThinkPad T420 and T420i Hardware Maintenance Manual 2020 LED board For access remove these FRUs in order 1010 Battery pack on page 63 2010 LCD bezel assembly on page 112 Removal steps of LED board Torque Screw quantity M2 x 3 mm Step 0 181 Nm 1 85 kgfcm ben head nylon coated flat H 113 Chapter 8 Removing and replacing a FRU When installing Make sure that the connector is attached firmly 114 ThinkPad T420 and T420i Hardware Maintenance Manual 2030 Integrated camera For access remove these FRUs in order 1010 Battery pack on page 63 2010 LCD bezel assembly on page 112 Removal steps of integrated camera Tor
112. he machine and to lock the wall box in the off position e f you need to work on a machine that has exposed electrical circuits observe the following precautions Ensure that another person familiar with the power off controls is near you Attention Another person must be there to switch off the power if necessary Use only one hand when working with powered on electrical equipment keep the other hand in your pocket or behind your back Attention An electrical shock can occur only when there is a complete circuit By observing the above rule you may prevent a current from passing through your body When using testers set the controls correctly and use the approved probe leads and accessories for that tester Stand on suitable rubber mats obtained locally if necessary to insulate you from grounds such as metal floor strips and machine frames Observe the special safety precautions when you work with very high voltages Instructions for these precautions are in the safety sections of maintenance information Use extreme care when measuring high voltages Regularly inspect and maintain your electrical hand tools for safe operational condition Do not use worn or broken tools and testers Never assume that power has been disconnected from a circuit First check that it has been powered off e Always look carefully for possible hazards in your work area Examples of these hazards are moist floors nongrounded po
113. hen a slight steady pressure is applied to the TrackPoint pointer This symptom is not a hardware problem If the pointer stops after a short time no service action is necessary If enabling theTrackPoint does not correct the problem continue with the following e Interactive Tests gt Mouse If the Touch Pad does not work check the configuration as specified in the ThinkPad Setup program If the Touch Pad is disabled select Automatic to enable it If enabling the Touch Pad does not correct the problem continue with the following e Interactive Tests Mouse Chapter 3 General checkout 33 Power system checkout To verify a symptom do the following Turn off the computer Remove the battery pack Connect the ac power adapter Check that power supplied when you turn on the computer Turn off the computer Disconnect the ac power adapter and install the charged battery pack Check that the battery pack supplies power when you turn on the computer If you suspect a power problem see the appropriate one of the following power supply checkouts e Checking the ac power adapter on page 34 Checking operational charging on page 34 Checking the battery pack on page 35 Checking the backup battery on page 35 Checking the ac power adapter You are here because the computer fails only when the ac power adapter is used e f the power problem occur
114. ialize the computer configuration some devices are disabled such as the serial port If you test one of these devices you will need to enable it by using Configuration utility for DOS The utility is available on the following Web site http www lenovo com support PC Doctor cannot be used to test a device that is in the docking station even if the computer supports the docking station To test a USB device connect it to the USB connector of the computer Testing the computer Note The PC Doctor for DOS CD R CD RW disc supports only test of internal optical disc drives CD RW CD RW DVD Combo and DVD Multi drives on ThinkPad computers It does not support test of any optical disc drives connected through USB devices PC cards CardBus cards or similar The USB limitation only applies to testing of the device Using a bootable PC Doctor for DOS CD DVD the system can be started from a USB attached optical drive To run the test do as follows 1 Turn off the computer 2 Make sure that the optical drive that is supported as a startup device is installed to the computer Chapter 3 General checkout 29 3 Turn on the computer If the computer cannot be powered on go to Power system checkout on page 34 and check the power sources If an error code appears go to Symptom to FRU index on page 43 When the ThinkPad logo comes up immediately press F12 to enter the Boot Menu Insert the PC Doctor CD into the optical drive
115. icrosoft group of companies Windows Microsoft The following terms are trademarks of Intel Corporation or its subsidiaries in the United States other countries or both Intel Intel Centrino Intel Core Other company product or service names may be the trademarks or service marks of others Appendix A Notices 169 170 ThinkPad T420 and T420i Hardware Maintenance Manual ThinkPad Part Number 60007 03 1P P N 0A60007_03
116. less than 11 0 V dc after recharging replace the battery 4 If the voltage is more than 11 0 V dc measure the resistance between battery terminals 5 and 7 The resistance must be 4 to 30 K If the resistance is not correct replace the battery pack If the resistance is correct replace the system board Checking the backup battery Do the following 1 Power off the computer and unplug the ac power adapter from it Turn the computer upside down Remove the battery pack see 1010 Battery pack on page 63 Remove the backup battery see 1100 Backup battery on page 79 a N Measure the voltage of the backup battery See the following figure Chapter 3 General checkout 35 Red we TS Pres 2 5 to 3 2 e lf the voltage is correct replace the system board e If the voltage is not correct replace the backup battery e f the backup battery discharges quickly after replacement replace the system board 36 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 4 Related service information This chapter presents following information Restoring the factory contents by using Recovery Disc Set on page 37 Passwords on page 38 e Power management on page 41 e Symptom to FRU index on page 43 Service Web site When the latest maintenance diskette and the system program service diskette become available they will be posted on http www lenovo com
117. lookup Input the MT and the Serial number and the list of key commodities will be returned in the PEW record under COMPONENT INFORMATION Using eSupport For Key Commodities Examples hard disk drive system board microprocessor LCD and memory Chapter 2 Important service information 25 e eSupport can be used to view the list of key commodities built in a particular machine serial this is the same record found in PEW e eSupport can be accessed at the following Web site http www lenovo com support e To view the key commodities do the following 1 Click Products amp Service Warranty 2 Click Check Warranty Status 3 On the Warranty Status Lookup page click Parts Lookup 4 Type your machine type and serial number and then click Submit The key commodities will be displayed For the Remaining FRUs the complete list of FRUs at the MT Model level e eSupport can be used to view the complete list of FRUs for a machine type and model e To view the complete list of FRUs do the following 1 Click Product amp Parts Detail and then follow the instructions on the screen to reach the Product and Parts Details page 2 Click the Parts Detail tab to view the list of service parts Using the HMM For Key Commodities Examples hard disk drive system board microprocessor LCD and memory Use the HMM as a back up to PEW and eSupport to view the complete list of FRUs at the MT Model level 26 ThinkPad T420 and T420i Hardw
118. me operation do one of the following e Press the Fn key e Open the LCD cover e Turn on the power switch Also in either of the following events the computer automatically returns from sleep standby mode and resumes operation e The ring indicator RI is signaled by a serial device or a PC Card device e The time set on the resume timer elapses Note The computer does not accept any input immediately after it enters sleep standby mode Wait a few seconds before taking any action to reenter operation mode Hibernation mode In hibernation mode the following occurs e The system status RAM VRAM and setup data are stored on the hard disk Chapter 4 Related service information 41 e The system is powered off Note If the computer enters the hibernation mode while it is docked to the docking station do not undock it before resuming normal operation If you do undock it and then try to resume normal operation you will get an error message and you will have to restart the system To cause the computer to enter hibernation mode do any of the following e Press the Fn F12 keys e f you have defined one of the following actions as the event that causes the system to go into hibernation mode perform that action Closing the lid Pressing the power button Pressing Fn F4 keys Also the computer goes into hibernation mode automatically in either of the following conditions e f a hibernation time has
119. n for full details ThinkPad Notebooks contain the following types of CRUs Self service CRUs These CRUs unplug or are held by no more than two screws Examples of these types of CRUs include the ac power adapter power cord battery and hard disk drive Other Self service CRUs depending on product design may include the memory module wireless card keyboard and palm rest with finger print reader and touchpad Optional service CRUs These CRUs are isolated parts within the computer that are concealed by an access panel that is typically secured by more than two screws Once the access panel is removed the specific CRU is visible FRUs marked with available as options Copyright Lenovo 2011 129 Overall 130 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall ThinkPad b g n Wireless 1x1 BGN 60Y3247 Intel Centrino Wireless N 1000 60Y3241 4177 2Qx 2Rx 2Sx 21 2Ux 2 2Wx 32x 33x 34x QGx ON QKx QLx QMx QVx QWx QXx QYx QZx R2x R3x R5x R6x R9x RBx RCx RGx RHx RJx RQx RRx RSx RTx RUx RVx RYx RZx 4178 CTO 5Jx 66x 6Mx 6Nx 82x 83x 84x A5x A7x AAx ACx ADx AEx AFx AJx AKx AUx AVx B7x B8x B9x BAx BBx BCx BKx BPx BQx BRx BUx BVx BWx BXx C2x C9x CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CUx CXx 4179 CTO GDx GEN GVx GWx 4180 J4x MTx MU
120. nce Manual Table 10 Parts list LCD FRUs continued CRU ID PGx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q2x Q3x 4 Q5x Q6x Q7x 09 4236 CTO 62x 63x 64x 65x MBx N2x N4x N5x N7x N8x N9x NAx NBx NCx NDx NEx NFx NGx NHx NKx NLx NPx NQx NRx NSx NTx NUx NVx NWx NXx NYx P2x P3x P4x P5x P6x P7x P8x P9x PBx PCx PDx PGx PJx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO Camera module 60Y9994 4177 22x 23x 24x 25x 26x 27x 28x 29x 2Ax 2Bx 2Cx 2Dx 2Ex 2Fx 2Gx 2Hx 2Jx 2Kx 2Lx 2 2 2 2Qx 2Rx 2Sx 2Tx 2Ux 2Vx 2Wx 2Xx 2Yx 32x 33x 34x 35x 36x GFx GKx GLx GMx Q2x Q3x Q4x Q5x Q8x QAx QBx QDx QEx QGx QHx QJx QKx QLx QMx QNx QPx QQx QRx QSx QUx QVx QWx QXx QYx QZx R2x R3x 4 R7x R8x R9x RAx RBx RCx RDx RFx RGx RHx RJx RKx RLx RMx RNx RPx RQx RRx RSx RTx RUx RVx RWx RXx RYx RZx 4178 CTO 52x 53x 54x 55x 56x 57x 58x 59x 5Ax 5Bx 5 5Dx 5Ex 5Gx 5Hx 5Jx 5 5Mx 5 5Px 5Qx 5Rx 55 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 5Zx 66x 68x 69x 6Ax 6Bx 6Cx 6Ex 6Fx 6Gx 6Hx 6Jx 6Kx 6Lx 6Mx 6Nx 6Px 6Qx 6Rx 65 6Ux 6Vx 6Wx 6Xx 6Yx 6Zx 82x 83x 84x 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9Cx
121. ned and the camera preview is turned on Note The camera settings area only appears if the computer has an integrated camera Fn F7 Apply a presentation scheme directly with no need to start Presentation Director To disable this function and use the Fn F7 key combination for switching a display output location start Presentation Director and change the settings Note If the computer is an Windows 7 model it does not support presentation schemes however the Fn F7 combination might still be used to switch display output location For Windows 7 Switch between the computer display and an external monitor Windows will show these display options e Computer display only LCD e Computer display and external monitor same image Computer display and external monitor extended desktop function e External monitor only Copyright Lenovo 2011 53 Table 8 Fn key combinations continued Note To switch between the computer display and an external monitor the Win P key combination is also available For Windows Vista and Windows XP Switch between the computer display and an external monitor If an external monitor is attached computer output is displayed in the following three patterns by turns e External monitor CRT display Computer display and external monitor LCD CRT display Computer display LCD Notes This function is not supported if different desktop images are displayed on the computer display and the e
122. ng and replacing a FRU 97 Torque Screw quantity Step 0 181 Nm Capture shoulder screw 4 1 85 kgfcm 0 181 Nm black 1 85 gt o bei 2 3 mm wafer head nylon For Discrete Graphics models 98 ThinkPad T420 and T420i Hardware Maintenance Manual For Integreted Graphics models When installing e Before you attach the fan assembly to the computer apply thermal grease at an amount of 0 2 grams on the parts marked EJ as in the following figures Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component For the fan in the integrated graphics models you need to peel the thin film off from the thermal rubber marked For Discrete Graphics models For Integrated Graphics models Chapter 8 Removing and replacing a FRU 99 a 3 e When attaching the fan assembly to the frame take care not to damage the heat sink Eg of the fan assembly AP 1 8 gt e Make sure that the fan connector 15 attached firmly 100 ThinkPad T420 and T420i Hardware Maintenance Manual 1180 For access remove these FRUS in order 1010 Battery pack on page 63
123. nsistors or integrated circuits ICs should be considered sensitive to electrostatic discharge ESD ESD damage can occur when there is a difference in charge between objects Protect against ESD damage by equalizing the charge so that the machine the part the work mat and the person handling the part are all at the same charge Chapter 1 Safety information 3 Notes 1 Use product specific ESD procedures when they exceed the requirements noted here 2 Make sure that the ESD protective devices you use have been certified ISO 9000 as fully effective When handling ESD sensitive parts Keep the parts in protective packages until they are inserted into the product Avoid contact with other people Wear a grounded wrist strap against your skin to eliminate static on your body e Prevent the part from touching your clothing Most clothing is insulative and retains a charge even when you are wearing a wrist strap Use a grounded work mat to provide a static free work surface The mat is especially useful when handling ESD sensitive devices e Select a grounding system such as those listed below to provide protection that meets the specific service requirement Note The use of a grounding system to guard against ESD damage is desirable but not necessary Attach the ESD ground clip to any frame ground ground braid or green wire ground When working on a double insulated or battery operated system use an ESD comm
124. nte uma bateria reserva recarregue a jogue a no fogo ou na gua ou deixe a entrar em curto circuito Descarte a bateria conforme requerido pelas leis ou regulamentos locais Use somente a bateria nas partes listadas apropriadas O uso de uma bateria incorreta pode resultar em combust o ou explos o da bateria A PERIGO O pacote da bateria cont m uma pequena quantidade de n quel N o o desmonte jogue o no fogo ou na gua ou deixe o entrar em curto circuito Descarte o pacote da bateria conforme requerido pelas leis ou regulamentos locais Use somente a bateria nas partes listadas apropriadas ao substituir o pacote da bateria O uso de uma bateria incorreta pode resultar em combust o ou explos o da bateria A PERIGO A bateria de l tio pode causar inc ndio explos o ou graves queimaduras N o a recarregue remova seu conector polarizado desmonte a aqueca a de 100 C 212 F incinere a ou exponha o conte do de sua c lula gua Descarte a bateria conforme requerido pelas leis ou regulamentos locais Use somente a bateria nas partes listadas apropriadas O uso de uma bateria incorreta pode resultar em combust o ou explos o da bateria A PERIGO Se o LCD quebrar e o fluido de dentro dele entrar em contato com seus olhos ou com suas m os lave as reas afetadas imediatamente com gua durante pelo menos 15 minutos Procure cuidados m dicos se algum sintoma causado pelo fluido surgir ap s a lav
125. ntenance Manual Rear view m EBEHEmBgmH dI Status indicators Note For the description of each indicator see Chapter 5 Status indicators on page 49 SmartCard slot DisplayPort connector USB connector RJ 45 Ethernet connector External monitor connector Power jack USB connector Modem connector or IEEE 1394 Chapter 9 Locations 127 Bottom view Battery pack Battery pack latch DIMM slot Docking connector LCD cover latch Serial Ultrabay Enhanced lock latch Serial Ultrabay Enhanced eject latch 128 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 10 Parts list This chapter contains following lists of the service parts Overall on page 130 LCD FRUs on page 150 Keyboard on page 154 Miscellaneous parts on page 156 Information about ac power adapters on page 158 Power cords on page 159 Recovery discs on page 160 Common service tools on page 166 Notes e Each FRU is available for all types or models unless specific types or models are specified e FRU with specific models listed and described as xxU where U is an example of a country designator should be used for all models ending in U e FRU with specific models listed and described as 3Dx where 3D is an example of a unique configuration should be used for all of these models unless specific country or region designator is specified A CRU custome
126. oduct ID on rear label Use this number when setting Serial Number In the example the Serial Number to be input is 1STTTTMMMSSSSSSS Retaining the UUID Universally Unique Identifier UUID is a 128 bit number uniquely assigned to your computer at production and stored in the EEPROM of your system board The algorithm that generates the number 15 designed to provide unique IDs until the year A D 3400 No two computers in the world have the same number When you replace the system board you must set the UUID on the new system board as follows 1 Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later and restart the computer 2 From the main menu select 4 Assign UUID A new UUID is created and written If a valid UUID already exists it is not overwritten Reading or writing the ECA information Information on Engineering Change Announcements ECA are stored in the EEPROM of the system board The electronic storage of this information simplifies the procedure to check if the ECA has been previously applied to a machine The machine does not need to be disassembled to check for the ECA application To check what ECAs have been previously applied to the machine use the ECA Information Read Write function on the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later 1 Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later and restart the com
127. on ground reference point You can use coax or connector outside shells on these systems Use the round ground prong of the ac plug on ac operated computers Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function Proper grounding of the electrical outlet can be verified by a certified electrician 4 ThinkPad T420 and T420i Hardware Maintenance Manual Safety notices multilingual translations The safety notices in this section are provided in the following languages English Arabic Brazilian Portuguese French German Hebrew Japanese Korean Spanish Traditional Chinese A DANGER Before the computer is powered on after FRU replacement make sure all screws springs and other small parts are in place and are not left loose inside the computer Verify this by shaking the computer and listening for rattling sounds Metallic parts or metal flakes can cause electrical shorts A DANGER Some standby batteries contain a small amount of nickel and cadmium Do not disassemble a standby battery recharge it throw it into fire or water or short circuit it Dispose of the battery as required by local ordinances or regulations Use only the battery in the appropriate parts listing Use of an incorrect battery can result in ignition or explosion of the battery A DANGER The battery pack contains small amounts of nickel Do not disassem
128. or Lens LED RJ 45 Knob wireless switch Lever wireless switch ODD lock button ODD eject spring ODD eject button ODD eject brecket Dust filter 1 Dust filter 2 Dust filter 3 Dust filter 4 Dust filter 5 ODD stop rubber Sponge L43W4H5 Sponge L15W4H5 Sponge L110W4H5 Sponge L85W3H3 Sponge L26W4H1 Keyboard bezel miscellaneous parts 04W1603 Magnet suspend switch Bracket touchpad Bracket right speaker Bracket left speaker Bracket left speaker EMI spring Bracket FPR EMI Speaker mesh Face sheet touchpad ThinkPad logo Bracket touchpad button Bracket FPR Insulation sheet touchpad 156 ThinkPad T420 and T420i Hardware Maintenance Manual Table 12 Parts list Miscellaneous parts continued Insulation sheet fingerprint LCD latch left LCD latch right LCD link LCD latch spring System miscellaneous parts 04W1604 a Express dummy card b LCD connector bracket c Fan bracket discrete CPU mylar 35W SV 2 1394 cover Dummy cover RJ 11 Plastic support for smart card Blind sheet for SIM card SIM dummy card Note Italicized letters in parentheses are references to the exploded view Overall on page 130 System board miscellaneous parts 04W1601 Insulation sheet MB Insulation sheet DDR Insulation sheet express card Insulation sheet battery Insulation sheet docking Insulation sheet bottom hole Insulation sheet DC in Bracket express card S
129. puter 2 From the main menu select 6 Set ECA Information 3 To read ECA information select 2 Read ECA rework number from EEPROM and follow the instruction 4 To read box build date select 5 Read box build date from EEPROM and follow the instruction on the screen After an ECA has been applied to the machine the EEPROM must be updated to reflect the ECA s application Use the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later to update the EEPROM Note Only the ECA number is stored in the EEPROM The machine type of the ECA assumed be the same as the machine type of the machine that had the ECA applied to it 1 Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1 76 or later and restart the computer 2 From the main menu select 6 Set ECA Information 3 To write ECA information select 1 Write ECA rework number from EEPROM and follow the instruction 4 To write box build date select 4 Write box build date from and follow the instruction on the screen If the system board is being replaced try to read the ECA information from the old system board and transfer the information to the new system If the system board is inoperable this will not be possible Chapter 7 FRU replacement notices 59 60 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 8 Removing and replacing a FRU This chapter presents directions and drawings for use in removing and r
130. que Screw quantity M2 x 3 mm Step 0 181 Nm 9 Q 9 gt o o E flat 1 85 kgfcm 115 Chapter 8 Removing and replacing a FRU 116 ThinkPad T420 and T420i Hardware Maintenance Manual 2040 LCD panel and LCD cable For access remove these FRUS in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 2010 LCD bezel assembly on page 112 2020 LED board on page 113 2030 Integrated camera on page 115 Removal steps of LCD panel and LCD cable Step Screw quantity Color Torque M2 x 3 mm wafer head nylon coated 4 Black 0 181 Nm 1 85 kgfcm When installing When attaching the LCD panel to the cover gently press the left and right edges covered with metal DO not press the surface of the panel or apply any excessive force to the panel Chapter 8 Removing and replacing a FRU 117 When installing Make sure that the connector is attached firmly 118 ThinkPad T420 and T420i Hardware Maintenance Manual 2050 Camera cable For access remove these FRUs in order 1
131. r replaceable unit is identified by a single asterisk or two asterisks in the CRU ID column An N in the CRU ID column means that the part is not a CRU A single asterisk means that the part is a Self service CRU two asterisks means that the part is an Optional service CRU External CRU statement to customers Some problems with your product can be resolved with a replacement part you can install yourself called a Customer Replaceable Unit or CRU Some CRUs are designated as Self service CRUs and others are designated as Optional service CRUs Installation of Self service CRUs is your responsibility you may request that Lenovo installs an Optional service CRU according to the warranty service for your product Where you are installing the CRU Lenovo will ship the CRU to you CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request You may find a list of CRUs in the publications that ship with your product or at http www lenovo com CRUs You may be required to return the defective part that is replaced by the CRU When return is required 1 return instructions a prepaid shipping label and a container will be included with the replacement CRU and 2 you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty 30 days of your receipt of the replacement CRU See your Lenovo Limited Warranty documentatio
132. re you continue Some computers have both a processor board and a system board If you are instructed to replace either the processor board or the system board and replacing one of them does not correct the problem reinstall that board and then replace the other one e f an adapter or a device consists of more than one FRU any of the FRUs may be the cause of the error Before replacing the adapter or device remove the FRUs one by one to see if the symptoms change Replace only the FRU that changed the symptoms Attention The setup configuration on the computer you are servicing may have been customized Running Automatic Configuration may alter the settings Note the current configuration settings using the View Configuration option then when service has been completed verify that those settings remain in effect Strategy for replacing a hard disk drive Always try to run a low level format before replacing a hard disk drive This will cause all customer data on the hard disk to be lost Be sure that the customer has a current backup of the data before doing this task Copyright Lenovo 2011 23 Attention The drive startup sequence in the computer you are servicing may have been changed Be extremely careful during write operations such as copying saving or formatting If you select an incorrect drive data or programs can be overwritten If your computer is shipped with an mSATA drive and a solid state drive or hard disk d
133. rge indicator or icon still does not turn on replace the battery pack If the charge indicator still does not turn on replace the system board Then reinstall the battery pack If it is still not charged go to the next section Checking the battery pack Battery charging does not start until the Power Manager Battery Gauge shows that less than 96 of the total power remains under this condition the battery pack can charge to 100 of its capacity This protects the battery pack from being overcharged or from having a shortened life To check your battery move your cursor to the Power Manager Battery Gauge icon in the icon tray of the Windows taskbar and wait for a moment but do not click and the percentage of battery power remaining is displayed To get detailed information about the battery double click the Power Manager Battery Gauge icon Note If the battery pack becomes hot it may not be able to charge Remove it from the computer and leave it at room temperature for a while After it cools down reinstall and recharge it To check the battery pack do the following 1 Power off the computer 2 Remove the battery pack and measure the voltage between battery terminals 1 and 7 See the following figure vorago V ac Ground 3 If the voltage is less than 11 0 V dc the battery pack has been discharged Note Recharging will take at least 3 hours even if the indicator does not turn on If the voltage is still
134. rive the mSATA drive will be seen as hard disk O in the system and assigned drive C The solid state drive or hard disk drive will be seen as hard disk 1 and assigned drive D The mSATA drive is installed in the wireless WAN card slot of the computer The Lenovo preloaded software installed on the mSATA drive Always try to run a low level format before replacing a hard disk drive This will cause all customer data on the hard disk to be lost Be sure that the customer has a current backup of the data before doing this task Attention The drive startup sequence in the computer you are servicing may have been changed Be extremely careful during write operations such as copying saving or formatting If you select an incorrect drive data or programs can be overwritten Important notice for replacing a system board Some components mounted on a system board are very sensitive Improper handling of a system board can cause damage to those components and may cause a system malfunction Attention When handling a system board e Do not drop a system board or apply any excessive force to it e Avoid rough handling of any kind e Avoid bending a system board and hard pushing to prevent cracking at each BGA Ball Grid Array chipset How to use error message Use the error codes displayed on the screen to diagnose failures If more than one error code is displayed begin the diagnosis with the first error code Whatever causes the first
135. rque Screw quantity Step 0 181 Nm 1 85 coated M2 x 3 mm wafer head nylon 94 ThinkPad T420 and T420i Hardware Maintenance Manual Step Screw quantity Torque a M2 5 x 6 mm wafer head nylon coated 2 Black 0 392 Nm 4 0 kgfcm When installing Make sure that you attach the connectors firmly e Make sure that you route the cables correctly and you tape up in the proper positions as shown in the above figure e When you route the cables make sure that they are not subjected to any tension Tension could cause the cables to be damaged by the cable guides or a wire to be broken Chapter 8 Removing and replacing FRU 95 96 ThinkPad T420 and T420i Hardware Maintenance Manual 1170 Fan assembly For access remove these FRUS in order 1010 Battery pack on page 63 1020 ExpressCard blank bezel on page 64 1050 DIMM slot cover on page 69 1070 PCI Express Mini Card for wireless WAN on page 71 1080 Keyboard on page 73 1110 PCI Express Mini Card for wireless LAN on page 81 1120 Keyboard bezel assembly FPC cable and Bluethooth daughter card on page 83 1150 Speaker assembly on page 91 1160 LCD unit on page 93 Removal steps of fan assembly Note Loosen the screws EJ to in order but do not remove them For Discrete Graphics models For Integreted Graphics models Chapter 8 Removi
136. rt site The HMM will have the 4 digit MT and 3 digit CTO model only Example 1829 CTO Again CMVs are custom models and are not found in the HMM General Announce Variant GAV This is a standard model fixed configuration GAVs are announced and offered to all customers The MTM portion of the machine label is a 4 digit MT and 3 digit model where model a fixed part number not CTO Example 1829 10 Also PEW eSupport and the HMM will list these products under the same fixed model number FRU identification for CTO CMV and GAV products There are three information resources to identify which FRUs are used to support CTO CMV and GAV products These sources are PEW eSupport and the HMM Using PEW e PEW the primary source for identifying FRU part numbers and FRU descriptions for the key commodities for CTO CMV and GAV products at a MT serial number level An example of key commodities are hard disk drives system boards microprocessors Liquid Crystal Displays LCDs and memory Remember all CTO and CMV products are loaded in PEW under the 4 digit MT and 3 digit model where model CTO Example 1829 are loaded PEW under the 4 digit MT and 3 digit model where model a fixed part number not CTO Example 1829 F1U e PEW be accessed at the following Web site http www lenovo com support site wss document do Indocid LOOK WARNTY Select Warranty
137. s F10 then in the Setup confirmation window select Yes How to remove the hard disk password Attention User only mode is selected and the user HDP has been forgotten and cannot be made available to the service technician neither Lenovo nor Lenovo authorized service technicians provide any services to reset the user HDPs or to recover data from the hard disk drive The hard disk drive can be replaced for a scheduled fee To remove a user HDP that has been forgotten when the SVP and the master HDP are known do the following 1 Turn on the computer Chapter 4 Related service information 39 2 When the ThinkPad logo comes up immediately press F1 to enter the ThinkPad Setup program When the POP icon is appearing on the screen enter the POP Select Security using the cursor directional keys to move the menu Select Password Select Hard disk x password where x is the letter of the hard disk drive A pop up window opens Select Master HDP Type the current master HDP in the Enter Current Password field then leave the Enter New Password field blank and press Enter twice Press F10 9 Select Yes in the Setup Configuration window Both user HDP and master HDP will have been removed oo 00 40 ThinkPad T420 and T420i Hardware Maintenance Manual Power management To reduce power consumption the computer has three power management modes screen blank sleep standby in Windows XP and hiberna
138. s d tach es ad quate Une batterie ou une pile inappropri e risque de prendre feu ou d exploser A DANGER La batterie contient du nickel Ne la d montez pas ne l exposez ni au feu ni l eau Ne la mettez pas en court circuit Pour la mettre au rebut conformez vous la r glementation en vigueur Lorsque vous remplacez la batterie veillez n utiliser que les mod les cit s dans la liste de pieces d tach es ad quate En effet une batterie inappropri e risque de prendre feu ou d exploser A DANGER La pile de sauvegarde contient du lithium Elle pr sente des risques d incendie d explosion ou de br lures graves Ne la rechargez pas ne retirez pas son connecteur polaris et ne la d montez pas Ne l exposez pas une temperature sup rieure a 100 C ne la faites pas br ler et n en exposez pas le contenu a l eau Mettez la pile au rebut conform ment la r glementation en vigueur Une pile inappropri e risque de prendre feu ou d exploser Chapter 1 Safety information 9 DANGER Si le panneau d affichage cristaux liquides se brise et que vous recevez dans les yeux ou sur les mains une partie du fluide rincez les abondamment pendant au moins quinze minutes Consultez un m decin si des sympt mes persistent apr s le lavage A DANGER Afin d viter tout risque de choc lectrique ne retirez pas le cache en plastique prot geant la partie inf rieure de la carte d alimentation A DA
139. s only when the docking station or the port replicator is used replace the docking station or the port replicator e f the power on indicator does not turn on check the power cord of the ac power adapter for correct continuity and installation e f the computer does not charge during operation go to Checking operational charging on page 34 To check the ac power adapter do the following 1 Unplug the ac power adapter cable from the computer 2 Measure the output voltage at the plug of the ac power adapter cable See the following figure pm sea Se 20V Note Output voltage of pin no 2 of the ac power adapter may different from the one you are servicing 3 If the voltage is not correct replace the ac power adapter 4 f the voltage is acceptable do the following e Replace the system board f the problem persists go to FRU tests on page 33 Note Noise from the ac power adapter does not always indicate a defect Checking operational charging To check whether the battery charges properly during operation use a discharged battery pack or a battery pack that has less than 5096 of the total power remaining when installed in the computer 34 ThinkPad T420 and T420i Hardware Maintenance Manual Perform operational charging If the battery status indicator or icon does not turn on remove the battery pack and let it return to room temperature Reinstall the battery pack If the cha
140. ted symptoms Characters missing pixels Reseat all LCD connectors Screen abnormal LCD assembly Wrong color displayed System board Horizontal or vertical lines displayed on LCD LCD assembly Chapter 4 Related service information 47 Intermittent problems Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect such as cosmic radiation electrostatic discharge or software errors FRU replacement should be considered only when a problem recurs When analyzing an intermittent problem do the following 1 Run the diagnostic test for the system board in loop mode at least 10 times 2 If no error is detected do not replace any FRUs 3 If any error is detected replace the FRU shown by the FRU code Rerun the test to verify that no more errors exist Undetermined problems If the diagnostic tests did not identify the adapter or device that has failed if wrong devices are installed or if the system simply is not operating follow these procedures to isolate the failing FRU do not isolate FRUs that have no defects Verify that all attached devices are supported by the computer Verify that the power supply being used at the time of the failure is operating correctly Gee Power system checkout on page 34 1 Turn off the computer 2 Visually check each FRU for damage Replace any damaged FRU 3 Remove or disconnect all of the following devices a
141. than 5 Slow blinking orange The battery is being charged When it reaches 20 the blinking color changes to green Slow blinking green The battery charge level is between 20 and 80 and charging is continuing When the battery reaches 80 charge the battery status indicator stops blinking but the charging may continue until the battery is 100 charged Note If the computer is operating on battery power the battery status indicator does not work while the computer is turned off or is in sleep standby mode or hibernation mode Quick blinking orange An error occurred in the battery The battery status indicator blinks three times Chapter 5 Status indicators 51 Table 7 Status indicators continued The ac power adapter is attached to the computer The battery status indicator is off The battery pack of the computer is fully charged or detached Sleep standby for Windows XP status The computer is in sleep standby mode amp Blinking green The computer is entering sleep standby mode or hibernation mode or is resuming normal operation 52 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 6 Fn key combinations The following table shows the function of each combination of Fn with a function key Table 8 Fn key combinations Fn F3 Select a power plan in Windows XP power scheme that has been created by Power Manager or adjust the power level by using the sli
142. tion Screen blank mode If the time set on the Turn off monitor timer in the operating system expires the LCD backlight turns off To put the computer into screen blank mode do as follows 1 Press Fn F3 A panel for selecting a power plan in Windows XP power scheme appears 2 Select Power off display keep current power plan in Windows XP keep current power scheme To end screen blank mode and resume normal operation press any key Sleep standby mode When the computer enters sleep standby mode the following events occur in addition to what occurs in screen blank mode The LCD is powered off The hard disk drive is powered off The CPU stops To enter sleep standby mode press Fn F4 Note You can change the action of the Fn F4 key combination by changing the settings in Power Manager In certain circumstances the computer goes into sleep standby mode automatically fa suspend time has been set on the timer and the user does do any operation with the keyboard the TrackPoint the hard disk the parallel connector or the diskette drive within that time e Ifthe battery indicator blinks orange indicating that the battery power is low Note Even if you do not set the low battery alarm the charge indicator notifies you when the battery is low and then the computer enters the power saving mode automatically To cause the computer to return from sleep standby mode and resu
143. ty LCD panel cracked from the application of excessive force or from being dropped Scratched cosmetic parts Distortion deformation or discoloration of the cosmetic parts Plastic parts latches pins or connectors that have been cracked or broken by excessive force Damage caused by liquid spilled into the system Damage caused by the improper insertion of a PC Card or the installation of an incompatible card Improper disc insertion or use of an optical drive Diskette drive damage caused by pressure on the diskette drive cover foreign material in the drive or the insertion of a diskette with multiple labels Damaged or bent diskette eject button Fuses blown by attachment of a nonsupported device Forgotten computer password making the computer unusable Sticky keys caused by spilling a liquid onto the keyboard Use of an incorrect ac power adapter on laptop products The following symptoms might indicate damage caused by nonwarranted activities Missing parts might be a symptom of unauthorized service or modification e If the spindle of a hard disk drive becomes noisy it may have been subjected to excessive force or dropped 28 ThinkPad T420 and T420i Hardware Maintenance Manual Checkout guide Use the following procedures as a guide in identifying and correcting problems with the ThinkPad Notebook Note The diagnostic tests are intended to test only ThinkPad products The use of non ThinkPad products prototype cards or
144. ures d crites dans le pr sent manuel Aer Certains produits laser contiennent une diode laser int gr e de classe ou 3B Prenez connaissance des informations suivantes Rayonnement laser lorsque le carter est ouvert Evitez toute exposition directe au rayon laser Evitez de regarder fixement le faisceau ou de l observer a l aide d instruments optiques A Vorsicht Bei der Installation von Laserger ten wie CD ROM Laufwerken DVD Laufwerken Einheiten mit Lichtwellenleitertechnik oder Sendern Folgendes beachten Die Abdeckungen nicht entfernen Durch Entfernen der Abdeckungen des Laserger ts k nnen gef hrliche Laserstrahlungen freigesetzt werden Das Ger t enth lt keine zu wartenden Teile Werden Steuerelemente Einstellungen oder Durchf hrungen von Prozeduren anders als hier angegeben verwendet kann gef hrliche Laserstrahlung auftreten seran Einige Laserger te enthalten eine Laserdiode der Klasse oder Beachten Sie Folgendes Laserstrahlung bei ge ffneter Verkleidung Nicht in den Strahl blicken Keine Lupen oder Spiegel verwenden Strahlungsbereich meiden Chapter 1 Safety information 19 A mmm norman 29 wu 891702 IN DUDIN 25272 PNA DVD xs n pas 57999 9931 INS pan na nmi 05 21339 179192 7x18 aoa AN pon DR n aXy bn pas 879512 mrs nan awr a2 279129 Ix Now AN DIS IN WS MAND 117222 DD
145. very discs Windows XP Professional DVDs Note The Windows XP Professional recovery DVDs are available only for models with a valid Microsoft Windows XP Professional certificate of authenticity affixed to the system Due to a Microsoft licensing limitation if a model came with Windows XP Professional preinstalled from the factory but has either a Windows 7 or Windows Vista COA affixed to the system that model is eligible only for recovery DVDs that match the operating system specified on the COA Windows XP Professional is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Table 17 Parts list Windows XP Professional recovery DVDs Language P N French 0471306 German 0471307 Italian Japanese Simplified Chinese US English Windows Vista Business 32 bit SP2 DVDs Note The Windows Vista recovery DVDs are available only for models with a valid Microsoft Windows Vista certificate of authenticity COA affixed to the system Due to a Microsoft licensing limitation if a model came with Windows Vista Business or Windows Vista Ultimate preinstalled from the factory but has a Windows 7 COA affixed to the system that model is eligible only for recovery DVDs that match the operating system specified on the COA Windows Vista Business 32 bit SP2 is preinstalled as the operating system in the following models 4177 CTO 4178 CTO 4179 CTO 4180
146. wer extension cables power surges and missing safety grounds Do not touch live electrical circuits with the reflective surface of a plastic dental mirror The surface is conductive such touching can cause personal injury and machine damage Do not service the following parts with the power on when they are removed from their normal operating places in a machine Power supply units Pumps Blowers and fans Motor generators Similar units to listed above This practice ensures correct grounding of the units e f an electrical accident occurs 2 ThinkPad T420 and T420i Hardware Maintenance Manual Use caution do not become a victim yourself Switch off power Send another person to get medical aid Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions As each machine was designed and built required safety items were installed to protect users and service technicians from injury This guide addresses only those items You should use good judgment to identify potential safety hazards due to attachment of non ThinkPad features or options not covered by this inspection guide If any unsafe conditions are present you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem Consider these conditions and the safety hazards they present e Electrical hazards especially primar
147. x K4x K5x K6x K7x K8x K9x KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x 14 L5x L6x L7x L8x L9x LAx LBx LCx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LPx LQx LRx LSx LTx LYx LZx M2x M3x M4x 5 M6x M9x MAx MBx MOx MDx MEx MGx MQx MRx MSx MTx MVx MWx MXx MZx N2x N3x N4x 5 N6x N7x N8x N9x NAx NOx NFx PDx PKx PLx PMx PNx PPx PQx PSx PXx Q3x Q6x Q7x Q9x 4236 CTO MBx N2x N3x N4x N5x N6x N7x N8x N9x NAx NBx NOx NDx NEx NFx NGx NHx NKx NLx NMx NNx NPx NQx NRx NSx NTx NWXx NXx NYx P2x P3x 4 P5x P8x P9x PBx PCx PDx PEx PHx PJx 4237 CTO 4238 CTO Speaker assembly 04W1633 04W1634 Magnesium structure frame assembly 04W1629 134 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea FRU Overall CCU DVD RAM RW drive 75Y5115 e 4177 22x 23x 24 25 26 27 28x 29x 2 2Bx 2Cx 2Dx 2 75Y5113 2Fx 2Gx 2Hx 2Ux 2Kx 2Lx 2Mx 2Nx 2Px 2Qx 2Rx 2Sx 2Tx 2Ux 2Vx 75Y5111 2Wx 2Xx 2 32x 33x 34x 35x 36x GFx GKx GLx GMx Q2x Q3x Q4x Q5x Q8x QAx QBx QCx QEx QGx QHx QUx QKx QLx QMx QNx QPx QQx QRx QSx QTx QUx QVx QWx QXx QYx QZx R2x R3x R4x R5x R6x R7x R8x R9x RAx RBx RCx RDx RFx
148. x 5 N7x N8x N9x NAx NBx NFx PGx PNx PRx PSx PUx PVx PWx PYx PZx Q3x Q4x Q5x 4236 CTO 63x 65x 4 N6x N7x N8x N9x NEx NHx NNx NSx NTx NVx P2x PFx PGx PKx PMx PNx PRx 4237 CTO 4238 CTO LED sub 04W1370 Clear plate kit 04W1620 Chapter 10 Parts list 153 Keyboard Table 11 Parts list Keyboard Language CRU ID Brazilian Portuguese Canadian French 058 Canadian French Acnor Finnish Swedish Greek U S English and Greek layout Latin American Spanish Traditional Chinese U S English International with a Euro symbol 154 ThinkPad T420 and T420i Hardware Maintenance Manual Table 11 Parts list Keyboard continuea Language CRU ID Netherlands 45N2090 45N2160 45N2230 Turkish F Type 60Y9552 60Y9554 60Y9550 Chapter 10 Parts list 155 Miscellaneous parts Table 12 Parts list Miscellaneous parts Screw and seal kit M2 x 3 mm black 5 M2 x 5 mm black M2 x 8 mm black M2 x 10 mm Silver M2 x 15 mm black M2 5 x 4 mm black M2 5 x 6 mm black M2 shoulder black Hex stud Silver 4 Tape 10 x 20 mm 10 Tape 10 x 25 mm 5 DDR3 tape 5 Base miscellaneous parts 04W1602 Foot rubber front left Foot rubber front right Foot rubber rear Bottom shield Insulation sheet CPU Insulation sheet system board Insulation sheet touchpad Insulation sheet battery connect
149. x L6x L7x L8x L9x LAx LBx LOx LDx LEx LFx LGx LHx LJx LKx LLx LMx LNx LRx LSx LTx LUx LVx LWx LXx LYx LZx M2x M3x M4x 5 M6x M7x M8x M9x MAx MBx MCx MDx MEx MFx MGx MHx MJx MKx MLx MMx MNx MPx MQx MRx MSx MTx MUx MVx MWx MXx MZx N2x N3x N4x N5x N6x N7x N8x N9x NAx NBx NOx NDx NEx NFx PAx PBx POx PDx PEx PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q2x Q3x Q4x Q5x Q6x Q7x Q8x Q9x 4236 62x 63x 64x 65x MBx N2x N3x 4 N5x N6x N7x N8x N9x NAx NBx NOx NFx NGx NHx NKx NLx NMx NNx NPx NQx NRx NSx NTx NUx NVx NWx NXx NYx P2x P3x 4 P5x P6x P7x P8x P9x PAx PBx PCx PDx PEx PFx PGx PHx PJx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PVx PWx PXx PYx e 4237 e 4238 CTO DVD ROM drive 75Y5117 4177 CTO 4178 CTO 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO Chapter 10 Parts list 195 Table 9 Parts list Overall continuea FRU Overall Travel Bezel 60Y5512 4177 CTO Q7x QDx QFx 4178 CTO 4179 CTO 4180 CTO LPx LQx 4236 CTO NDx NEx 4237 CTO 4238 CTO Audio sub card e 4177 CTO e 4178 CTO e 4179 CTO CRU ID 04W1623 4180 e 4236 CTO e 4237 e 4238 10 Audio sub card cable e 4177 CTO e 4178 CTO e 4179 CTO 4180 CTO 4236 CTO 4237 CTO 4238 CTO DC in cable 04W163
150. x 9Vx 9Wx 9Xx 9Yx 9Zx A2x A3x A4x A9x ABx ADx AEx AFx AGx AHx AJx AKx ALx AMx ANx APx ASx ATx AUx AVx AWx AXx AYx AZx B2x B3x B4x 5 B6x B8x B9x BAx BBx BCx BDx BFx BGx BHx BJx BKx BMx BNx BPx BQx BRx BSx BTx BUx BYx BZx C2x C3x C4x C5x C6x C7x C8x C9x CAx CBx CCx CDx CEx CFx CGx CHx CJx CKx CLx CMx CNx CPx CQx CRx CSx CUx CWx CXx CYx 4179 G3x G4x G5x G6x G8x G9x GBx GCx GDx GGx GHx GJx GMx GNx GPx GQx GRx GSx GTx GUx GVx GWx GXx 4180 CTO 63x 65x J2x J3x 44 K2x 4 K5x K6x K7x K8x K9x KAx KBx KOx KDx KEx KFx KGx KHx KJx KKx KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L8x L4x L5x L6x L7x L8x L9x LAx LBx LOx LDx LNx LPx LQx LRx LSx LTx LUx LVx LWx LXx LYx LZx M2x M3x M4x 5 M6x M7x M8x MAx MBx MCx MDx MEx MFx MGx MHx MJx MKx MMx MNx MPx MQx MRx MSx MTx MUx MVx MWx MXx MYx MZx N2x N3x 4 5 N6x N7x N8x Chapter 10 Parts list 133 Table 9 Parts list Overall continuea N9x NBx NFx PAx PBx PFx PGx PHx PLx PPx PRx PSx PTx PUx PVx PWx PXx PYx PZx Q3x Q4x Q5x Q6x Q7x Q9x e 4236 CTO 63x MBx N2x N3x 4 5 N8x N9x NAx NBx NDx NEx NFx NGx NHx NKx NLx NMx NNx
151. x GLx Q3x Q4x QBx QEx QFx QHx QRx QWx QXx QYx QZx R4x RAx ROx RDx RHx RJx RKx RLx RQx RTx RUx RWx RXx RZx 4178 CTO 54x 55x 58x SEX 5Fx 5Hx 5Qx 55 5Yx 57 6Ax 6Px 6Rx 6Sx 6Vx 6Wx 6Xx 6Yx 82x 94x 99x 9Ax 9Dx 9Ex 9Hx 9Jx 9Kx 9Lx 9Mx 9Nx 9Sx 9Tx 9Ux 9Xx A2x A3x A4x A5x A9x AEx AQx AXx B8x BFx BHx BQx BRx BTx BUx BVx BXx BZx C4x C7x CGx CHx CMx CNx CPx CQx CYx 4179 CTO G9x GCx GDx GHx GJx GMx GNx GPx GTx GUx GVx GWx GXx 4180 CTO 64x 65x J2x J3x J4x KLx KMx KNx KPx KQx KRx KSx KTx KUx KVx KWx KXx KYx KZx L2x L3x L4x L5x L6x L7x L8x L9x LAx LBx LCx LLx LMx LQx LVx LXx LYx LZx M3x M4x 5 M6x MAx MFx MGx MHx MKx MMx MRx MTx MXx MZx N3x 4 N5x N6x N7x N8x N9x NAx NEx PKx PLx PMx PNx PPx PQx PRx PSx PTx PUx PWx PYx PZx Q4x Q5x Q6x Q7x Q8x Q9x 4236 64x 65x 4 N9x NAx NBx NDx NEx NFx NPx NQx NRx NSx NVx NWx P2x PFx PKx PNx PRx PWx PYx 4237 CTO 4238 CTO Chapter 10 Parts list 147 Table 9 Parts list Overall continued FPC cable touch pad with fingerprint reader and Bluetooth 04W1625 e 4177 CTO 22x 23x 24x 27x 29x 2 2Bx 2Cx 2Dx 2Ex 2Fx 2Gx 2Hx 2Jx 2Kx 2Lx 2Mx 2 2Px 2Qx 2Rx 2Sx 2Tx 2Ux 2Vx 2Wx 2 2Yx 32x 33x 34x 35x 36x GFx GKx GLx G
152. x LPx LQx LVx LXx M8x MCx MDx MEx MRx MSx MZx N2x NFx PBx POx PUx PVx PWx PXx PYx PZx Q3x 4236 CTO N3x NDx NEx PDx PJx PKx PMx PPx PQx 4237 CTO e 4238 CTO 25 SmartCard Reader 04W1638 e 4177 2Fx 2Gx 2Hx Q7x QAx QBx QPx R9x RBx RCx RLx 04W2084 RMx RRx RSx RTx RUx e 4178 CTO 5Lx 5 5 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5Vx 5Wx 5Xx 5Yx 5Zx 66x 68x 6Bx 6Cx 6Ex 6Fx 6Gx 6Qx 6Rx 6Xx 6Yx 6Zx 92x 93x 94x 95x 96x 97x 98x 99x 9Ax 9Bx 9Cx A5x A6x A7x AEx AXx AYx AZx B2x B3x B4x BDx BEx BFx BHx BJx BMx BNx BPx BQx BRx BUx BVx BWx BXx BZx C3x C4x C5x C6x CBx CFx CHx CKx CLx CMx CNx CPx CQx CXx CYx 4179 CTO GXx e 4180 CTO KEx KFx L9x LAx LBx LPx LVx LXx MCx MDx MEx MRx MSx MZx N2x NDx NEx NFx PBx PUx PWx PXx PYx PZx Q3x 4236 CTO N3x NDx NEx PDx PJx PKx PMx PPx PQx 4237 CTO 4238 CTO 146 ThinkPad T420 and T420i Hardware Maintenance Manual Table 9 Parts list Overall continuea Fan assembly integrated 04W0407 e 4177 25x 26x 27x 28x 29x 2Dx 2 2Fx 2Gx 2 2 2Rx 25 04W0409 35x 36x GKx GMx Q2x Q5x Q7x Q8x QAx QCx QDx QGx QJx QKx QLx QMx QNx QSx QTx QUx QVx R2x R3x R5x R6x R7x R8x R9x RBx RFx RGx RMx RNx RPx RRx RSx RVx RYx 4178 CTO 52x 53x 56x 57x 59x
153. x MVx MWx MXx N3x N4x N5x PJx PKx PLx PMx PNx PPx PQx Q6x Q7x Q8x Q9x 4236 CTO NXx NYx P7x P8x POx PDx PEx PJx 4237 CTO 4238 CTO 4177 25x 26x 27x 28x 29x 2 2Bx 2Cx 2Dx 2Ex 2Fx 2Gx 2Kx 60Y3249 2Lx 2Mx 2Xx 2Yx 36x GFx GKx GLx GMx Q7x QDx QQx QRx QSx R4x RDx RFx RNx RPx 4178 CTO 53x 6 6Cx 6Ex 9Fx 9Gx 9Hx 9Jx 9Kx 9Lx 9 9Nx 95 9Tx 9Ux 9Vx 9Wx 9Xx 9Yx AGx AHx AMx AQx ARx AZx B2x B3x B4x B5x B6x BDx BEx BFx BHx BJx BNx CDx CRx CSx 4179 CTO G2x G3x G4x G5x G6x G7x G8x G9x GGx GHx GJx GMx GNx GPx GSx GTx GUx GXx 4180 CTO LEx LFx LGx LHx LJx LKx LNx LPx LRx LSx LTx MAx PDx PEx 4236 CTO N6x N7x N8x N9x NOx NKx NLx 4 PBx PPx PQx 4237 CTO 4238 CTO 4236 CTO 62x 63x 64x 65x MBx N2x N3x N5x NAx NBx NDx NEx NHx NMx NNx NSx NTx NUx NVx P3x P5x P6x PAx PHx PKx PLx PNx PRx PSx PTx PUx PVx PWx PXx PYx 4237 CTO 4238 CTO Intel Centrino Advanced N 6205 2x2 AGN 60Y3253 4177 22x 23x 24x 2Nx 2Px 35x Q2x Q3x Q4x Q5x QHx QNx R8x RAx RKx RLx RMx RWx RXx 4178 CTO 52x 54x 55x 56x 57x 58x 59x 5Ax 5Bx 5 5Dx 5Ex 5Fx 5Gx 5Hx 5 5Lx 5Mx 5Nx 5Px 5Qx 5Rx 5Sx 5Tx 5Ux 5Vx 5Wx 5Xx 57 68x 69x 6Ax 6Fx 6Gx 6Hx 6Kx 6Px 6Qx 6Rx 6Sx 6Ux 6Vx 6Wx 6Xx 6 6Zx
154. xternal monitor the Extend desktop function This function does not work while a DVD movie or a video clip is playing To enable this function start Presentation Director and change the settings Note Multiple users can log on to a single operating system by using different user IDs Each user needs to do the following Click Start gt All Programs gt ThinkVantage gt Presentation Director and change the Fn F7 settings Fn F12 Fn PgUp Fn End Put the computer into hibernation mode To return to normal operation press the power button for less than four seconds Notes To use this combination of the keys ThinkPad PM device driver must have been installed on the computer Though the screen fades out immediately after Fn F12 are pressed the computer does not enter the hibernation mode immediately Do not move the system until the sleep standby status indicator stops blinking Moving the computer when it is entering hibernation might cause corruption of the hard disk drive Turn the ThinkLight on or off Note This function is supported only on the ThinkPad Notebooks that have the ThinkLight The on or off status of the ThinkLight is shown on the screen for a few seconds when you press Fn PgUp The computer display becomes brighter The purpose of this method is to change the brightness level temporarily On Windows Vista the default brightness level is loaded after sleep standby hibernation reboot or detachin
155. y power primary voltage on the frame can cause serious or fatal electrical shock e Explosive hazards such as a damaged CRT face or a bulging capacitor Mechanical hazards such as loose or missing hardware To determine whether there are any potentially unsafe conditions use the following checklist at the beginning of every service task Begin the checks with the power off and the power cord disconnected Checklist 1 Check exterior covers for damage loose broken or sharp edges 2 Power off the computer Disconnect the power cord 3 Check the power cord for a A third wire ground connector in good condition Use a meter to measure third wire ground continuity for 0 1 ohm or less between the external ground pin and the frame ground b The power cord should be the type specified in the parts list c Insulation must not be frayed or worn 4 Check for cracked or bulging batteries 5 Remove the cover 6 Check for any obvious non ThinkPad alterations Use good judgment as to the safety of any non ThinkPad alterations 7 Check inside the unit for any obvious unsafe conditions such as metal filings contamination water or other liquids or signs of fire or smoke damage 8 Check for worn frayed or pinched cables 9 Check that the power supply cover fasteners screws or rivets have not been removed or tampered with Handling devices that are sensitive to electrostatic discharge Any computer part containing tra
156. you set up for the authentication wm Undock docking station or port replicator if it is attached to the ThinkPad Notebook Place the ThinkPad Notebook on a horizontal surface Do not apply any physical shock to the computer Run Diagnostics gt ThinkPad Devices gt HDD Active Protection Test Reseat the hard disk drive Main hard disk drive System board Reseat the hard disk drive Ultrabay hard disk drive System board Reseat the Mini SATA device Mini SATA device System board Reseat the hard disk drive Main hard disk drive System board Reseat the hard disk drive Ultrabay hard disk drive System board Reseat the Mini SATA device Mini SATA device System board System board System board Error messages Table 3 Error messages Symptom or error FRU or action in sequence Fan error 1 Fan 2 Thermal grease 3 System board Thermal sensing error System board This system does not support batteries that are not Replace the battery genuine Lenovo made or authorized This system will continue to boot but may not charge unauthorized batteries Attention Lenovo has no responsibility for the performance or safety of unauthorized batteries and provides no warranties for failures or damage arising out of their use Chapter 4 Related servi

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