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Lenovo IdeaCentre A520

1. Step 6 Remove the 6 screws that secure the hinge to the chassis H then lift up the hinge to remove it from the chassis H E nna 0000000000000 ae wl HEES CL Step 7 To reattach the hinge to the chassis a Line up the hinge with the chassis and slide the hinge into position b Secure the hinge to the chassis with the 6 screws c Reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Step 8 Reattach the base cover and secure it with the screws 48 IdeaCentre A520 All In One PCHardware Maintenance Manual Removing the rear cover Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To remove the rear cover Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Rais
2. 44 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 11 Step 12 Step 13 Step 14 Step 15 Step 16 Step 17 Step 18 Step 19 Remove the 7 screws that secure the motherboard to the chassis and slide it out as shown nef e Remove the 2 screws that secure the TV Tuner card to the motherboard Disconnect the antenna cable s from the TV Tuner card Pull the TV Tuner card upward to remove it from the card port ef N a ZB T L To install the new TV Tuner card a Insert the notched end of the TV Tuner card into the card port b Secure the new TV Tuner card to the motherboard with the 2 screws c Connect the antenna cable s to the new TV Tuner card Line up the motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure the motherboard to the chassis with the 7 screws Reattach the speaker system optical drive heat sink system fan and hard disk drive to the motherboard Reconnect all the cables to the motherboard Reattach the base cover and secure it with the screws Chapter 8 Replacing hardware 45 Replacing the battery Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the battery Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Remove any media disk
3. Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Remove the 2 screws that secure the camera to the front bezel Step 8 Lift up the camera J and disconnect the data cable from the camera BD Step 9 To install the new camera a Connect the data cable to the new camera b Line up the holes in the new camera with the mounting holes on the front bezel and secure the new camera with the 2 screws Step 10 Reattach the rear cover to the LED panel Step 11 Reattach the hinge to the chassis Step 12 Reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Step 13 Reattach the base cover and secure it with the screws Replacing the front function board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover 56 IdeaCentre A520 All In One PCHardware Maintenance Manual To replace the front function board Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Step 14 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and
4. Step 13 To install the new converter board a Line up the holes on the new converter board with the mounting holes on the middle frame and secure it with the 4 screws b Connect the 2 cables to the new converter board Reattach the rear cover to the LED panel Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the power switch board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the power switch board Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Disconnect the power cable from the power switch board Remove t
5. x Z fo S e f WA eo f f Gs E ef SS 9 a y L Z WA ii WA a Se AE ay n S tw S N WA Ke SC Se f been Step 14 Line up the motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure it to the chassis with the screws Step 15 Reattach the speaker system optical drive heat sink system fan and hard disk drive to the motherboard Step 16 Reconnect all the cables to the motherboard Step 17 Reattach the base cover and secure it with the screws Removing the hinge from the chassis Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To remove the hinge from the chassis Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Chapter 8 Replacing hardware 47 Step 3 Disconnect all cables attached to the computer This includes power cords input output 1 0 cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Disconnect the scalar headphone input scalar and DVI HDMI cables from the connectors on the motherboard
6. 5 Hard disk drive indicator 6 Bluetooth status indicator 7 Wi Fi status indicator Copyright Lenovo 2012 21 Left and right view The following illustration shows the location of connectors controls and components on the left and right side of the computer S Attention Do not insert 3 inch discs into the optical drive 22 IdeaCentre A520 All In One PCHardware Maintenance Manual Rear view The following illustration shows the location of connectors and components on the rear of the computer Jemen 0 H p Lunea 5 USB 2 0 connectors 2 6 Power connector 7 Ethernet connector RJ45 8 Security cable slot Chapter 7 Locating connectors controls and components 23 Hardware components The following illustration shows the components that make up your computer h LM sch zl 1 System fan 16 Bluetooth module 2 Scalar board 17 Power switch board 3 Hard disk drive bracket 18 Front function board 4 Hard disk drive 19 Battery 5 Hard disk drive rubbers 20 Solid state disk 24 IdeaCentre A520 All In One PCHardware Maintenance Manual Identifying parts on the motherboard The motherboard sometimes called the planar or system board is the main circuit board in your computer It provides basic computing functions and supports a var
7. BIOS then ignores the missing keyboard during POST Reboot and Select proper Boot device or Insert Boot The BIOS was unable to find a suitable boot device Make Media in selected Boot device sure the boot drive is properly connected to the computer Make sure you have bootable media in the boot device Undetermined problems 1 Power off the computer 2 Remove or disconnect the following components if connected or installed one at a time a n 0 0 G f External devices modem printer or mouse Extended video memory External Cache External Cache RAM Hard disk drive Disk drive 3 Power on the computer to re test the system 4 Repeat steps 1 through 3 until you find the failing device or component If all devices and components have been removed and the problem continues replace the system board 20 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 7 Locating Connectors controls and Components This section provides illustrations to help locate the various connectors controls and components of the computer Font view The following illustration shows the location of controls and components on the front of the computer Attention Be careful not to block any air vents on the computer Blocked air vents can cause overheating idsacontro i i 3 Built in microphone selected models only
8. Elp_RJ2108BDBG GN F 4GB D3 1600SMemory 1100426 IN M471B5273CHO CKO 4GB 1100613 D3 1600SMemory HF Mic_S D9PFJ 4GB D3 1600SMemory 1100641 IN 500G 5400rpm Seagate ST9500325AS 500G 9NB HDD 16004189 IN SATAIL HDD HT HTS547550A9E384 5400RPM 500G HDD 16200006 IN WD WDSOOOBPVT 24HXZ 5400RPM 500G HDD 16004846 9 5mm 4k sector WD WDS5000BPVT 24A1YTO 5400PRM 9 5mm 16200089 500 HDD HGST Jaguar B7 500G P SATA2 0 5400RPM 16200067 interface 4K sector generation Seagate Yarra 1D 500G P SATA2 0 5400RPM 16200211 interface 4K sector generation ST500LM012 5 4K 9 5 500G HDD 16200210 N ZIZIZIZIZIZIZIZIZIZ ZIZIZIZIZ ZIZIZ N N N 62 IdeaCentre A520 All In One PCHardware Maintenance Manual WDS5000LPVT 08G33T1 7mm 5 4K rpm 500G 16200264 N HDD 750G 5400rpm WD WD7500BPVT 24HXZT3 5400RPM 750G 16004848 N SATAII HDD HDD HT HTS547575A9E384 5400RPM 750G HDD 16200008 N 9 5mm WD WD7500BPVT 24A1YTO 5400PRM 9 5mm 16200088 N 750 HDD HGST Jaguar B 750G P SATA2 0 5400RPM 16200192 interface 4K sector generation product ST750LM022 5 4K 9 5 750G HDD 16200209 e 1TB 5400RPM HGST Jaguar B 1TB P SATA2 0 5400RPM 16200193 SATAII HDD interface 4K sector generation product WD WD10JPVT 24A1YTO 5400PRM 9 5mm 1T 16200071 HDD ST1000LM024 5 4K 9 5 1T HDD 16200208 SSD 64G Samsung PM830 64G mSATA SSD 16200109 ODD Tray in DVD HLDS GT50N Slim Tray Rambo ODD LH 25201635 Pambo TSST SN 208AB Slim Rambo ODD W O 25201108 N Bezel LH Optiarc AD 7740H Slim
9. Field Replaceable Units FRUs e Before you start to work on the computer unplug the power cord If you cannot unplug it ask the customer to power off the electrical outlet that supplies power to the machine and to lock the electrical outlet in the off position e f you need to work on a computer that has exposed electrical circuits observe the following precautions Ensure that another person familiar with the power off controls is near you Remember 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 Remember There must be a complete circuit to cause electrical shock By observing the above rule you may prevent a current from passing through your body When using a tester 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 these instructions are in the safety sections of the maintenance information Use extreme care when measuring high voltages e Regularly inspect and maintain your electrical hand tools to ensure they are safe to use e Do not use worn or broken tools and testers e Never assume that power has been disco
10. Rambo ODD W O 25201106 Bezel LH PLDS DS 8A8SH Slim Rambo ODD LH DS 8A8SH Slim Rambo ODD LH PLDS DS 8A8SH Slim Rambo ODD LH 25201487 Cae HLDS GT80N Slim SATA Rambo ODD W O 25209015 Bezel LH PLDS DS 8A9SH Slim Tray Rambo W O 25209016 N Bezel LH TSST SN 208DB Slim Rambo ODD W O 25209014 N Bezel LH ODD Tray in BD PLDS DS 6E2SH BDCombo W O Bezel LH 25200328 N Combo BE HLDS CT40N Slim BD Combo W O Bezel LH 25201493 Optiarc BC 5550H BD Combo W O Bezel LH 25204159 TSST TS LB23D BDCombo W O Bezel LH 25200329 N BE 150W Adapter FSP150 RAB 150W ADAPTER 36001876 Liteon PA 1151 11VA 150w adapter 36001875 120W Adapter DeltaADP 120ZB ee 120W ADAPTER R 36001857 LiteonPA 1121 04LA 1 EE 36200226 ULCSAPower Cable Vox rom 05 US Poweroae aos ooo Chapter 8 Replacing hardware 63 Luxshare 1 0m C5 Austrilian Power Cable 31049520 Gg 1 0M C5 JPN power cord with converter 31038887 line cord 31039655 3pin2pin converter Volex 1m C5 Japan Power Cable 31049506 line cord 31039655 3pin2pin converter Luxshare 1 0m C5 Japan Power Cable 31049519 line cord 31039655 3pin2pin converter Grandsun Black Single end 1 0m 3wire CCC 31032953 1 Power Cable R Luxshare 1 0M C5 CCC Power Cable 31045147 longwell Black Single end 1 0m ASTA Power 31035396 Ed Cable Volex 1 0m Volex 1 0m C5 UK Power Cabe UK Power Cable Volex 1 0m C5 UK Power Cable 1731049496 Ge longwell Black Single end 1 0m VDE Pow
11. Replacing hardware 29 Removing the base cover Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover Note It may be helpful to place the computer face down on a soft flat surface for this procedure Lenovo recommends that you use a blanket towel or other soft cloth to protect the computer screen from scratches or other damage To remove the base cover Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Place the computer face down on a soft flat surface then remove the 7 screws that secure the base cover to the base om om ss G Ss 0000000000000 at IDDIE SP S Step 5 Return the computer to an upright position then lift up the base cover and slide it out as shown 30 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 6 To reattach the base cover a Line up the base cover with the base slide it back and snap it into position b Place the computer face down on a s
12. hazards are present you must determine how serious the apparent hazard could be and whether you can continue without first resolving the problem Consider the following items and the safety hazards they present e Electrical hazards especially primary power primary voltage on the frame can cause serious or fatal electrical shock e Explosive hazards such as a damaged CRT face or bulging capacitor e Mechanical hazards such as loose or missing hardware The guide consists of a series of steps presented as a checklist 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 frame ground b The power cord should be the appropriate type as specified in the parts listings c Insulation must not be frayed or worn 4 Remove the cover 5 Check for any obvious alterations Use good judgment as to the safety of any alterations 6 Check inside the unit for any obvious hazards such as metal filings contamination water or other liquids or signs of fire or smoke damage 7 Check for worn frayed or pinched cables 8 Check that the power supply cover fasteners screws or rivets have not been removed or ta
13. the last device tested Copyright Lenovo 2012 11 12 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 5 Using the Setup Utility The Setup Utility program is used to view and change the configuration settings of your computer regardless of which operating system you are using However the operating system settings might override any similar settings in the Setup Utility program Starting the Lenovo BIOS Setup Utility program To start the Lenovo BIOS Setup Utility program do the following 1 If your computer is already on when you start this procedure shut down the operating system and turn off the computer 2 Press and hold the F1 key then turn on the computer When the Lenovo BIOS Setup Utility program is displayed release the F1 key Note If a Power On Password or an Administrator Password has been set the Setup Utility program menu will not be displayed until you type your password For more information see Using passwords Viewing and changing settings System configuration options are listed in the Lenovo BIOS Setup Utility program menu To view or change settings see Starting the Setup Utility program You must use the keyboard when using the Lenovo BIOS Setup Utility menu The keys used to perform various tasks are displayed on the bottom of each screen Using passwords You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons from g
14. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option oar Go DY Select Save Changes and Exit from the menu To change a Power On Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Power On Password and press the Enter key 3 The password dialog box will be displayed Type the current password then press the Enter key 4 Type the new password then press the Enter key Re type the new password to confirm it If you typed the new password correctly the new password will be installed A Setup Notice will be displayed confirming that your changes have been saved 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save Changes and Exit from the menu To delete a previously set Power On Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Power On Password and press the Enter key 3 The password dialog box will be displayed Type the current password and press the Enter key 4 Leave each new password line item blank then press Enter key A Setup Notice will be displayed confirming that your changes have been saved 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6
15. Select Save Changes and Exit from the menu Enabling or disabling a device The Devices options is used to enable or disable user access to the following USB Functions Select whether to enable or disable USB Universal Serial Bus functions If the functions are disabled no USB devices can be used SATA Mode When this feature is set to Disabled all devices connected to the SATA connectors e g hard disk drives or the optical disk drive are disabled and cannot be accessed Chapter 5 Using the Setup Utility 15 Onboard Audio Controller Select whether to enable or disable the Onboard Audio Controller When this feature is set to Disabled all devices connected to the audio connectors e g headphones or a microphone are disabled and cannot be used Onboard Ethernet Controller or LAN Boot Agent Select whether to enable or disable the Onboard Ethernet Controller or select whether to enable or disable load onboard PXE Preboot Execution Environment To enable or disable a device do the following 1 Start the Setup Utility program see Starting the Setup Utility program on page 13 2 From the Setup Utility program menu select Devices 3 Select an option as follows Select USB Setup press the Enter key then select USB Functions Select ATA Device Setup press the Enter key then select SATA Mode Select Audio Setup press the Enter key then select Onboard Audio Controller Select Network Setup press the Ente
16. aCentre A520 All In One PCHardware Maintenance Manual To view or permanently change the configured startup device seguence do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Lenovo BIOS Setup Utility program main menu select the Startup option 3 Press the Enter key and select the devices for the Primary Boot Sequence Read the information displayed on the right side of the screen 4 Use and Marrows to select a device Use the lt gt or lt gt keys to move a device up or down Use the lt x gt key to exclude the device from or include the device in the boot sequence 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save Changes and Exit from the menu Notes a If you do not want to save the settings select Discard Changes and Exit from the menu b If you have changed these settings and want to return to the default settings select Load Optimal Defaults from the menu Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing settings press the Esc key to return to the Lenovo BIOS Setup Utility program main menu You might have to press the Esc key several times Do one of the following e If you want to save the new settings select Save Changes and Exit from the menu When the Save amp reset window shows select the Yes button and then press the En
17. able from the front bezel Remove the camera Refer to Replacing the camera Remove the front function board Refer to Replacing the front function board 58 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 16 Remove all the cables attached to the middle frame and the front bezel Step 17 Remove the 5 screws that secure the hinge to the middle frame and set the hinge aside Step 18 To install the new the LED panel a Line up the holes on the hinge with the mounting holes on the new middle frame and secure it with 5 screws Attach all the cables to the new LED panel middle frame and front bezel c Attach the Wi Fi card Bluetooth module power switch board converter board touch control board scalar board and front function board to the new LED panel middle frame and connect all the cables to the new LED panel Step 19 Reattach the rear cover to the LED panel Step 20 Reattach the hinge to the chassis Step 21 Reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Step 22 Reattach the base cover and secure it with the screws FRU lists This chapter lists the information on the field replaceable units FRUs Attention Be sure to read and understand all the safety information before replacing any FRUs Notes FRUs that have a 1 or 2 in the CRU column are Customer Replaceable Units CRUs e 1 identifies parts that are fairly simple to replace requi
18. aining access to your computer and data See Starting the Setup Utility program The following types of passwords are available e Administrator Password e Power On Password You do not have to set any passwords to use your computer However if you decide to set passwords read the following sections Password considerations A password can be any combination of letters and numbers up to 16 characters a z and 0 9 For security reasons it is a good idea to use a strong password that cannot be easily compromised We suggest that passwords should follow these rules e For astrong password use 7 16 characters and a mix of letters and numbers e Do not use your name or your user name e Do not use a common word or a common name e Use something significantly different from your previous password Attention Administrator and Power On passwords are not case sensitive Copyright Lenovo 2012 13 Administrator Password Setting an Administrator Password deters unauthorized persons from changing configuration settings You might want to set an Administrator Password if you are responsible for maintaining the settings of several computers After you set an Administrator Password a password prompt is displayed every time you access the Lenovo BIOS Setup Utility program If both the Administrator and Power On Password are set you can type either password However you must use your Administrator Password to change any configuratio
19. all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Remove the 2 screws that secure the front function board to the front bezel Disconnect the data cable from the front function board H Lift up the front function board to remove it from the front bezel E To install the new front function board a Connect the data cable to the new front function board b Line up the holes in the new front function board with the mounting holes on the front bezel and secure it with the 2 screws Reattach the rear cover to the LED panel Reattach the hinge to the chassis Reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the LED panel Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover Chapter 8 Replacing hardware 57 Note It may be helpful to place the computer face down on a soft flat surface for this
20. card installed It does not apply to computers without a TV tuner card Important Safety Information Be sure to read all CAUTION and DANGER sections in this manual before following any of the instructions Veuillez lire toutes les consignes de type DANGER et ATTENTION du pr sent document avant d ex cuter les instructions Lesen Sie unbedingt alle Hinweise vom Typ ACHTUNG oder VORSICHT in dieser Dokumentation bevor Sie irgendwelche Vorg nge durchf hren Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una qualsiasi delle istruzioni Certifique se de ler todas as instru es de cuidado e perigo neste manual antes de executar qualquer uma das instru es Es importante que lea todas las declaraciones de precauci n y de peligro de este manual antes de seguir las instrucciones BUT EAT IN ZT TPT RB SEAS SP A E fE 00 PUT ETA BRE RAE TRR TAR Ci Copyright Lenovo 2012 1 2 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 2 Safety information This chapter contains the safety information that you need to be familiar with before servicing a computer General safety Follow these rules to ensure general safety e Keep the areas around the computer clear and clean during and after maintenance s When lifting any heavy object Ensure you can stand safely without slipping Distribute the weight of the object equally across b
21. ched devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the system fan Refer to Replacing the system fan Step 6 Remove the heat sink Refer to Replacing the heat sink Chapter 8 Replacing hardware 35 Step 7 Use a flat head screwdriver to turn the CPU lock screw counterclockwise to unlock the CPU HEA Step 8 Lift the microprocessor straight up and out of the socket H Attention Do not touch the gold contacts on the bottom of the microprocessor When handling the microprocessor touch only the sides Note Do not drop anything onto the microprocessor socket while it is exposed The socket pins must be kept as clean as possible Step 9 Holding the sides of the microprocessor with your fingers remove the protective cover H that protects the gold contacts on the new microprocessor H Step 10 Holding the sides of the microprocessor with your fingers position the microprocessor so that the notches on the microprocessor are aligned with the tabs in the microprocessor socket Important To avoid damaging the microprocessor contacts keep the microprocess
22. computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Chapter 8 Replacing hardware 39 Step 5 Step 6 Step 7 Step 8 Remove the 2 screws that secure the solid state disk to the motherboard Pull the solid state disk upward to remove it from the card port To install the new solid state disk a Insert the notched end of the new solid state disk into the card port on the motherboard b Secure the new solid state disk to the motherboard using the 2 screws Reattach the base cover and secure it with the screws Replacing the motherboard Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the motherboard Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This i
23. dware 37 Step 6 Remove the 3 screws that secure the optical drive to the motherboard and lift the optical drive up to remove it Step 7 Remove the 4 screws that secure the optical drive to the bracket and disconnect the data connector from the rear of optical drive 38 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 8 Use a small flat head screwdriver to press and push out the pins that secure the cover to the drive Hi Step 9 Separate the cover from the defective optical drive Step 10 Install the new optical drive as follows a b c d e Align the new optical drive with the cover and then attach the cover to the new optical drive Connect the data connector to the new optical drive Align the new optical drive with the bracket push it into position and secure it with the 4 screws Line up the optical drive bracket with the mounting holes on the motherboard and secure it with the 3 screws Reconnect the data cable to the connector on the motherboard Step 11 Reattach the base cover and secure it with the screws Replacing the solid state disk Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the solid state disk Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the
24. e then stick it to the middle frame Reattach the rear cover to the LED panel Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the converter board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the converter board Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Remove the 4 screws that secure the converter board to the middle frame Disconnect the 2 cables from the converter board Lift up the converter board to remove it 52 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 10 Step 11 Step 12
25. e the hinge Hand slide the rear deco out as shown H Step 7 Put the head of a flat head screwdriver between the middle frame and the rear cover as shown Then using the screwdriver as a lever and the middle frame metal bar as the fulcrum prise the rear cover away from the middle frame ge wi R aa RL LI Wu D H Step B Working around the edge in an anti clockwise direction use your fingers to prise up the rear cover The rear cover is pinned into place use short sharp movements to prise it up H Fulcrum EL Step 9 Press down the hinge and slide out the rear cover Step 10 To reattach the rear cover Chapter 8 Replacing hardware 49 Step 11 Step 12 a Raise the hinge line up the rear cover with the LED panel and slide it back into position b Press the edge of rear cover to lock the cover to the LED panel with the pins c Slide the rear deco back into position Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the scalar board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the scalar board Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Remove any media dis
26. ect cables as described in the following table when installing moving or opening covers on this product or attached devices 6 IdeaCentre A520 All In One PCHardware Maintenance Manual Turn everything OFF Turn everything OFF First attach all cables to devices First remove power cords from outlets Attach signal cables to connectors Remove signal cables from connectors Attach power cords to outlet Remove all cables from devices Turn device ON CAUTION When replacing the lithium battery use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer If your system has a module containing a lithium battery replace it only with the same module type made by the same manufacturer The battery contains lithium and can explode if not properly used handled or disposed of Do not s Throw into or immerse in water e Heat to more than 100 C 212 F e Repair or disassemble Dispose of the battery as required by local ordinances or regulations A CAUTION When laser products such as CD ROMs DVD ROM drives fiber optic devices or transmitters are installed note the following s Do not remove the covers Removing the covers of the laser product could result in exposure to hazardous laser radiation There are no serviceable parts inside the device e Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiatio
27. ecure it with the screws Replacing the touch control board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the touch control board Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Disconnect all the touch cables from the touch control board Lift up the touch control board to remove it from the middle frame To install the new touch control board a Connect all the cables to the new touch control board b Remove the insulating paper siliconed paper of the double sided tape on the new touch control board Chapter 8 Replacing hardware 51 Step 10 Step 11 Step 12 c Line up the new touch control board with the mounting marks on the middle fram
28. enovo 2012 27 Replacing the keyboard and mouse To replace the keyboard and mouse Step 1 Step 2 Step 3 Step 4 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output 1 0 cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors lt lt Note Your keyboard will be connected to a USB connector on one side or at the rear of the computer Disconnect the defective keyboard cable from the computer and connect the new keyboard cable to the same connector Note The mouse can be replaced using the same method Replacing the power adapter To replace the power adapter Step 1 Step 2 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Locate the connector for the power cord Refer to Rear view 28 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 3 Disconnect the failing power adapter from the computer Step 4 To install the new power adapter a Connect the new power adapter to the same connector Chapter 8
29. er 31035332 Cable Volex 1 0m C5 Volex 1 0m C5 Europe Power Cable Power Cable Volex 1 0m C5 Europe Power Cable 31049497 moe i Luxshare 1 0m C5 Luxshare 1 0m C5 Europe Power Cable Power Cable Luxshare 1 0m C5 Europe Power Cable 31049518 S longwell Black Single end 1 0m India Power 31035395 Cable Longwell Black Single end 1 0m Italy C5 Power 31039104 Cable Volen 1 0m C5 ItalyPower Cable 31049504 Longwell Black Single end 1 0m Brazil Power 31035828 1 Cable Volex 1 0m C5 BrazilPower Cable 31049505 1o Longwell Black Single end 1 0m Argentina 31039100 C5Power Cable Volex 1 0m Volex 1 0m C5 US Power Cable US Power Cable Volex 1 0m C5 US Power Cable 31049507 Longwell Black Single end 1 0m Denmark 31039101 C5Power Cable Volex 1 0m Volex 1 0m C5 Denmark Power Cable Denmark Power Cable Volex 1 0m C5 Denmark Power Cable 31049503 as Longwell Black Single end 1 0m Switzerland 31039103 C5Power Cable Volex 1 0m Volex 1 0m C5 Switzerland Power Cable Switzerland Power Cable Volex 1 0m C5 Switzerland Power Cable T 31049508 dg Longwell Black Single end 1 0m Israel CSPower 31039107 Cable Volex 1 0m C5 Israel Power Cable 31049502 Longwell Black Single end 1 0m Taiwan 31038885 1 C5Power Cable Volex 1 0m C5 Taiwan Power Cable 31049499 64 IdeaCentre A520 All In One PCHardware Maintenance Manual Longwell Black Single end 1 0m Korea C5Power 31039106 1 Cable Volex 1 0m Vol
30. ex 1 0m C5 Korea Power Cable Korea Power Cable Volex 1 0m C5 Korea Power Cable T 31049498 a Longwell Black Single end 1 0m SA C5Power 31039105 Cable Volex 1 0m C5 SA Power Cable Ge i rome SA VET MnITV God anton Ww aver nse Ove H H CS verde ss ATSC MINT G n GEH CS Sc eemcgseeen Jess KA en Bomazoro a0 ER E JK eorura ovn sporge oan aoo EE Ww EE EES Keyboard Liteon SK 8861 GB 2 4G KB only Silver8 Liteon SK 8861 FR 2 4G KB only Silver8 Liteon SK 8861 DE 2 4G KB only Silver8 Liteon SK 8861 US 2 4G KB only Silver8 Liteon SK 8861 EN FR 2 4G KB Only S8 Liteon SK 8861 BE EN 2 4G KB Only S8 Teon S38610F1246 C HS icon S366 i 2 4618 G HS Liteon SK 8861 e 2 AG KB Only Silver8 25210653 Ji o Liteon SK 8861 CH 2 4G KB Only Silver8 25210752 Ji o ZIZIZIZIZIZIZIZIZIZIZIZIZI gt Chapter 8 Replacing hardware 65 LiteonSK 8861 EN FR S SikKB Silver WW 90200549 1 eon 838615 S Sikke Smer Wwy oo Teor skes en SSK KE Sr wal oos ai Km aaa Jee j G HE a G HE H a Liteon SK 8861 BG S Silk KB Silver WW 90200565 Ji Liteon SK 8861 HU S Silk KB Silver WW 90200566 In KEE 1 Liteon aaa ww 90200568 Jai Liteon SK 8861 LA AR S SilkKB Silver WW Liteon SK 8861 BE S Silk KB Silver WW Liteon SK 8861 IS S Silk KB Silver WW LiteonSK 8861 Nordic S SilkKB Silver WW Liteon SK 8861 NL S Silk KB Silver WW 66 IdeaCentre A520 All In One PCHardware Mainte
31. g system is installed on the boot drive Install an operating system on the boot drive The boot sector on the startup drive is corrupted The drive must be formatted Do the following 1 Attempt to back up the data on the failing hard disk drive 2 Use the operating system to format the hard disk drive The drive is defective Replace the hard disk drive Power Supply Problems Follow these procedures if you suspect there is a power supply problem Check Verify FRU Action Check that the following are properly installed Reseat connectors e Power Cord e On Off Switch connector e System Board Power Supply connectors e Microprocessor connections Copyright Lenovo 2012 19 POST error codes Each time you turn the computer on it performs a series of tests to check that the system is operating correctly and that certain options are set This series of tests is called the Power On Self Test or POST POST does the following e Checks some basic motherboard operations e Checks that the memory is working correctly e Starts video operations e Verifies that the boot drive is working POST Error Message Description Action Keyboard error Cannot initialize the keyboard Make sure the keyboard is properly connected to the computer and that no keys are held pressed during POST To purposely configure the computer without a keyboard select Keyboardless operation in Startup and set the option to Enabled The
32. he screw that secures the power switch board to the LED panel and lift up the power switch board to remove it To install the power switch board Chapter 8 Replacing hardware 53 Step 10 Step 11 Step 12 a Line upthe hole on the new power switch board with the mounting hole on the LED panel and secure it with the screw b Connect the power cable to the new converter board Reattach the rear cover to the LED panel Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the Bluetooth module Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the Bluetooth module Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer
33. iety of devices that are factory installed or that you can install later The following illustration shows the location of connectors and components on the front of the motherboard ool lool D 22 B PIB m 1 HDMI out connector 12 TV jack 2 Japan only 4 Ethernet connector RJ45 6 System fan connector 7 Scalar cable connector 8 Scalar cable connector as Chapter 7 Locating connectors controls and components 25 The following illustration shows the location of connectors and components on the back of the motherboard 23 TV Tuner card connector 24 Battery 26 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 8 Replacing hardware Attention Do not remove the computer cover or attempt any repair before reading the Important safety information in the Safety and Warranty Guide that was included with your computer To obtain copies of the Safety and Warranty Guide go to the Support Web site at http support lenovo com Note Use only parts provided by Lenovo General information Pre disassembly instructions Before starting the disassembly procedure make sure that you do the following 1 Turn off the power to the system and all peripherals 2 Unplug all power and signal cables from the computer 3 Place the system on a flat stable surface Copyright L
34. input Input voltage 90V 264V AC Input frequency 47Hz 63Hz Copyright Lenovo 2012 9 10 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 4 General Checkout Attention The drives in the computer you are servicing might have been rearranged or the drive startup seguence may have been changed Be ertremely careful during write operations such as copying saving Or formatting Data or programs can be overwritten if you select an incorrect drive General error messages appear if a problem or conflict is found by an application the operating system or both For an explanation of these messages refer to the information supplied with that software package Use the following procedure to help determine the cause of the problem Power off the computer and all external devices Check all cables and power cords Set all display controls to the middle position Power on all external devices ar OO N A Power on the computer e Look for displayed error codes e Look for readable instructions or a main menu on the display If you did not receive the correct response proceed to step 6 If you did receive the correct response proceed to step 7 6 If one of the following happens follow the instruction given e lf the computer displays a POST error go to POST error codes s f the computer hangs and no error is displayed continue at step 7 7 If the test stops and you cannot continue replace
35. ks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Disconnect all the cables from the scalar board HER Remove the 5 screws that secure the scalar board to the middle frame and lift it up to remove it LED CIR LVDS MMB Power Bluetooth WLAN Camera Converter Touch control Scalar HDMI DVI H 6 9 L G G eo o 0 To install the new scalar board a Line up the holes on the new scalar board with the mounting holes on the middle frame and secure the new scalar board with the 5 screws b Connect all the cables to the new scalar board 50 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 10 Step 11 Step 12 Reattach the rear cover to the LED panel Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and s
36. lenovo IdeaCentre A520 All In One PC Hardware Maintenance Manual ideaideaideaCentreidea Machine Types 6597 10106 A520 lenovo IdeaCentre A520 All In One PC Hardware Maintenance Manual Machine Types 6597 10106 A520 First Edition August 2012 25th Copyright Lenovo 2012 LIMITED AND RESTRICTED RIGHTS NOTICE If data or software are 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 Chapter 1 About this manual Important Safety Information Chapter 2 Safety information General safety Electrical safety Safety inspection guide Handling electrostatic discharge sensitive devices Grounding requirements Safety notices Chapter 3 General information Specifications Chapter 4 General Checkout Chapter 5 Using the Setup Utility Starting the Lenovo BIOS Setup Utility program Viewing and changing settings Using passwords Enabling or disabling a devieg Selecting a startup device Exiting the Lenovo BIOS Setup Utility program Chapter 6 Symptom to FRU Index Hard disk drive boot error Power Supply Problems POST error codes Undetermined problems Chapter 7 Locating connectors controls and components Copyright Lenovo 2012 aw wo LM aon on o 11 13 13 13 13 15 16 17 19 19 19 20 20 21 Chap
37. mpered with Handling electrostatic discharge sensitive devices Any computer part containing transistors 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 computer the part the work mat and the person handling the part are all at the same charge 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 Chapter 2 Safety information 5 e Keep the parts in protective packages until they are inserted into the product e Avoid contact with other people while handling the part e 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 e Use the black side of 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 is desirable but not required to protect against ESD damage Attach the ESD ground cli
38. n exposure P Some laser products contain an embedded Class YA or Class 3B laser diode Note the following These diodes emit radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposure to the beam Chapter 2 Safety information 7 218 kg 37 Ibs 232 kg 70 5 Ibs CAUTION Use safe practices when lifting AA CAUTION The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device The device also might have more than one power cord To remove all electrical current from the device ensure that all power cords are disconnected from the power source AA AA 20a 1 VU mb gt A CAUTION Do not place any object weighing more than 82 kg 180 Ibs on top of rack mounted devices 8 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 3 General information This chapter provides general information that applies to all computer models covered by this manual Specifications This section lists the physical specifications for your computer This section lists the physical specifications for your computer Type IdeaCentre A520 This section lists the physical specifications Environment Air temperature Operating 10 to 35 C Transit 20 to 55 C Humidity Operating 35 to 80 Transit 20 to 90 40 C Altitude 86KPa to 106KPa Electrical
39. n settings Setting changing or deleting an Administrator Password To set an Administrator Password do the following Note A password can be any combination of letters and numbers up to 16 characters a z and 0 9 For more information see Password considerations on page 13 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Administrator Password and press the Enter key 3 The password dialog box will be displayed Type the password then press the Enter key 4 Re type the password to confirm then press the Enter key If you typed the password correctly the password will be installed To change an Administrator Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Administrator Password and press the Enter key 3 The password dialog box will be displayed Type the current password then press the Enter key 4 Type the new password then press the Enter key Re type the new password to confirm it If you typed the new password correctly the new password will be installed A Setup Notice will be displayed confirming that your changes have been saved 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save Changes and Exit from the menu To dele
40. nance Manual Chapter 9 General information This chapter provides general information that applies to all computer models covered by this manual Additional Service Information This chapter provides additional information that the service representative might find helpful Power management Power management reduces the power consumption of certain components of the computer such as the system power supply processor hard disk drives and some monitors Advanced configuration and power interface ACPI BIOS As this computer has an ACPI BIOS system the operating system is allowed to control the power management features of the computer and the settings for Advanced Power Management APM BIOS mode is ignored Not all operating systems support ACPI BIOS mode Automatic Power On features The Automatic Power On features within the Power Management menu allow you to enable and disable features that turn on the computer automatically e Wake Up on Alarm You can specify a date and time at which the computer will be turned on automatically This can be either a single event a daily event or a weekly event e Wake Up on LAN This feature allows LAN adapter card to wake the System Copyright Lenovo 2012 67
41. ncludes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hard disk drive Refer to Replacing the hard disk drive Remove all memory modules Refer to Replacing a memory module Remove the optical drive Refer to Replacing the optical drive Remove the system fan Refer to Replacing the system fan Remove the heat sink Refer to Replacing the heat sink Remove the CPU Refer to Replacing the CPU Remove the solid state disk Refer to Replacing the solid state disk Remove all the cables connected to the motherboard Remove the 4 screws that secure the speakers then detach them from the chassis and put them aside 40 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 14 Remove the 7 screws that secure the motherboard to the chassis and slide it out as shown nef e a 4 G G Step 15 Remove the 2 screws that secure the TV Tuner card to the motherboard Step 16 Disconnect the antenna cable s from the TV Tuner card Step 17 Pull the TV Tuner card upward to remove it from the card port Chapter 8 Replacing hardware 41 Step 18 Use a flat head screwdriver as a lever to prise out the battery gently as shown Step 19 To install
42. nditions that might be hazardous to your eyes e After service reinstall all safety shields guards labels and ground wires Replace any safety device that is worn or defective e Reattach all covers correctly before returning the computer to the customer CAUTION Electrical current from power telephone and communication cables can be hazardous To avoid personal injury or equipment damage disconnect any attached power cords telecommunication cables network cables and modem cables before you open the computer covers unless instructed otherwise in the installation and configuration procedures Electrical safety Copyright Lenovo 2012 3 Observe the following rules when working on electrical eguipment 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 rubber floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge 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 s 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
43. nnected 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 wet floors non grounded power extension cables conditions that may cause or allow power surges and missing safety grounds s Do not touch live electrical circuits with the reflective surface of a plastic dental mirror This surface is conductive and touching a live circuit can cause personal injury and damage to the computer s Do not service the following parts with the power on when they are removed from their normal operating positions in a computer Power supply units Pumps Blowers and fans Motor generators and similar units This practice ensures correct grounding of the units e H an electrical accident occurs Use caution do not become a victim yourself 4 IdeaCentre A520 All In One PCHardware Maintenance Manual Switch off power Send another person to get medical aid Safety inspection guide The intent of this inspection guide is to assist you in identifying potential hazards posed by these products Each computer as it was designed and built had required safety items installed to protect users and service personnel from injury This guide addresses only those items However good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide If any
44. oft flat surface then secure the base cover to the base with the 7 screws c Return the computer to an upright position Replacing the hard disk drive Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the hard disk drive Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the 2 screws that secure the hard disk drive to the motherboard Step 6 Disconnect the data and power cables from the hard disk drive H Chapter 8 Replacing hardware 31 Step 7 Slide the hard disk drive and rubbers out of the bay as shown Step 8 Step 9 Install the new hard disk drive as follows a Attach the rubbers to the new hard disk drive Slide the new hard disk drive into the hard disk drive bay Secure the new hard disk drive to motherboard with the 2 screws R 0 0 Connect the data and power cables to the new hard disk drive and to the connectors on the m
45. or completely level while installing it into the socket 36 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 11 Step 12 Step 13 Step 14 Lower the microprocessor straight down into its socket on the motherboard To secure the microprocessor by turning the CPU lock screw clockwise to lock the CPU into position BEH Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor Each drop of grease should be 0 03 ml 3 tick marks on the grease syringe Reattach the system fan heat sink and base cover then secure them with the screws Replacing the optical drive Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the optical drive Step 1 Step 2 Step 3 Step 4 Step 5 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Disconnect the optical drive data cable from the connector on the motherboard Chapter 8 Replacing har
46. oth feet Lift slowly Never move suddenly or twist when you attempt to lift gt OO N Lift by standing or by pushing up with your leg muscles this action removes the strain from the muscles in your back Do not attempt to lift any objects that weigh more than 16 kg 35 Ibs or objects that you think are too heavy for you e Do not perform any action that would create a hazard for the customer or would make the computer unsafe e Before you start the computer ensure that other service representatives and customer personnel are not in a position that would create a hazard for them e Place removed covers and other parts in a safe place away from all personnel while you are servicing the computer e Keep your tool case away from areas that people may walk through to ensure no one trips over it e Do not wear loose clothing that can be trapped in the moving parts of a machine Ensure that your sleeves are fastened or rolled up above your elbows If your hair is long tie or fasten it back e Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip approximately 8 centimeters 3 inches from the end s Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Remember Metal objects are good electrical conductors e Wear safety glasses when you are hammering drilling soldering cutting wire attaching springs using solvents or working in any other co
47. otherboard Step 10 Reattach the base cover and secure it with the screws Replacing a memory module Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace a memory module Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover 32 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 5 Step 6 Step 7 Push out the latches on both sides of the memory socket to release the memory module Gently pull the memory module upward to remove it from its socket To install the new memory module a Align the new memory module with the memory socket then insert it and push down on the top edge b Make sure the latches lock the memory module in place Reattach the base cover and secure it with the screws Replacing the system fan Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the sy
48. p to any frame ground ground braid or green wire ground Use an ESD common ground or reference point when working on a double insulated or battery operated system 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 Safety notices The CAUTION and DANGER safety notices in this section are provided in the language of English AA DANGER Electrical current from power telephone and communication cables is hazardous To avoid a shock hazard s Do not connect or disconnect any cables or perform installation maintenance or reconfiguration of this product during an electrical storm e Connect all power cords to a properly wired and grounded electrical outlet e Connect any equipment that will be attached to this product to a properly wired outlet e When possible use one hand only to connect or disconnect signal cables e Never turn on any equipment when there is evidence of fire water or structural damage e Disconnect the attached power cords telecommunications cables network cables and modem cables before you open the device covers unless instructed otherwise in the installation and configuration procedures e Connect and disconn
49. procedure Lenovo recommends that you use a blanket towel or other soft cloth to protect the computer screen from scratches or other damage To replace the LED panel Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Step 14 Step 15 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Remove the scalar board Refer to Replacing the scalar board Remove the touch control board Refer to Replacing the touch control board Remove the converter board Refer to Replacing the converter board Remove the power switch board Refer to Replacing the power switch board Remove the Bluetooth module Refer to Replacing the Bluetooth module Remove the Wi Fi card Refer to Replacing the Wi Fi card Remove the Wi Fi antenna c
50. r key then select Onboard Ethernet Support or LAN Boot Agent 4 Select Disabled or Enabled and press the Enter key 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save Changes and Exit from the menu Notes a If you do not want to save the settings select Discard Changes and Exit from the menu b Select IDE AHCI Mode Device driver support is required for AHCI Depending on how the hard disk image was installed changing this setting may prevent the system from booting Selecting a startup device If your computer does not boot from a device such as the CD DVD ROM drive disk or hard disk as expected follow one of the procedures below Selecting a temporary startup device Use this procedure to start up from any boot device Note Not all CDs DVDs or hard disk drives are bootable 1 Turn off your computer 2 Press and hold the F12 key then turn on the computer When the Startup Device Menu appears release the F12 key Note If the Startup Device Menu does not display using these steps repeatedly press and release the F12 key rather than keeping it pressed when turning on the computer 3 Use t and arrows to select the desired startup device from the Startup Device Menu and press the Enter key to begin Note Selecting a startup device from the Startup Device Menu does not permanently change the startup sequence Selecting or changing the startup device sequence 16 Ide
51. ring few or no tools e 2 identifies parts that are slightly more difficult to replace e N identifies parts that are not to be replaced by the customer Chapter 8 Replacing hardware 59 wo FC N aa 60 IdeaCentre A520 All In One PCHardware Maintenance Manual Z 17 Power switch A720 Power Board 90000214 board 18 Front function A720 LED Function Board 90000216 board Scalar board A520 Scalar Board 90001192 Touch control A520 Touch Control Board 90001193 board A720 Speaker L R board bracket fomos TH T 9 Z Chapter 8 Replacing hardware 61 Intel i3 3110M 2 4GHz 3MB 2c L1 PGAProcessor 102500303 Intel i5 3210M 2 5GHz 3MB 2c L1 PGAProcessor 102500301 Intel i5 3360M 2 8GHz 3MB 2c L1 PGAProcessor 102500297 Intel i7 3820QM 2 7GHz 4MB 4c E1 102500304 N PGAProcessor Intel i17 3720QM 2 6GHz 4MB 4c E1 102500306 N PGAProcessor Intel i17 3610QM 2 3GHz 6MB 4c E1 102500289 N PGAProcessor Intel B970 2 3G QO 2M 2cPGA Processor 4102500230 2 2GHz STD 35W ouer Processor Jeer DN rie 6960 2206 2M 38W SNB PGA Processor _ 102800133 N rie o or20m 256 Lion zerea cru Jee n C H n mensas 26G am 2croa H n Dm Tess roor w muzee ros n mmasai 1100428 n M471B5773CHS CK0 2GB 1100614 D3 1600SMemory HF Mic_S D9PFJ 2GB D3 1600SMemory 1100646 N SM322NGO8IBF 4GB PC3 12800 M471B5273DHO CKO 1100230 IN 1600MHz DDR3 SOLNM HMT351S6CFR8C PB 1100231 No MT16KTF51264HZ 1G6M1 1100232 IN
52. rives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hard disk drive Refer to Replacing the hard disk drive Remove the optical drive Refer to Replacing the optical drive Remove the system fan Refer to Replacing the system fan Remove the heat sink Refer to Replacing the heat sink Remove all the cables connected to the motherboard Remove the 4 screws that secure the speakers then detach the speakers from the chassis and put them aside Remove the 7 screws that secure the motherboard to the chassis and slide it out as shown ef Chapter 8 Replacing hardware 43 Step 12 Detach the speakers from the chassis Step 13 To install the new speaker system a Attach the new speaker cable to the chassis b Line up the motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure it to the chassis with the 7 screws c Line up the new speaker system with the mounting holes on the chassis and secure the new
53. s CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hard disk drive Refer to Replacing the hard disk drive Remove the optical drive Refer to Replacing the optical drive Remove the system fan Refer to Replacing the system fan Remove the heat sink Refer to Replacing the heat sink Remove all the cables connected to the motherboard Remove the 4 screws that secure the speakers then detach the speakers from the chassis and put them aside Remove the 7 screws that secure the motherboard to the chassis and slide it out as shown ef 46 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 12 Use a flat head screwdriver as a lever to prise out the battery as shown s K 8 gt YA sa Step 13 To install the new battery a Insert the new battery CR2032 into the socket with the side labeled facing up and press the battery into place YA See ii cs m 7 L gt J YA J j L 2 J YA z ji l j Ba ga gt o J
54. speaker system with the 4 screws d Connect the new speaker cable to the connector on the motherboard Step 14 Reattach the optical drive heat sink system fan and hard disk drive to the motherboard Step 15 Reattach the base cover and secure it with the screws Replacing the TV tuner card Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the TV tuner card Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hard disk drive Refer to Replacing the hard disk drive Step 6 Remove the optical drive Refer to Replacing the optical drive Step 7 Remove the system fan Refer to Replacing the system fan Step 8 Remove the heat sink Refer to Replacing the heat sink Step 9 Remove all the cables connected to the motherboard Step 10 Remove the 4 screws that secure the speakers then detach them from the chassis and put them aside
55. stem fan Step 1 Step 2 Step 3 Step 4 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Chapter 8 Replacing hardware 33 Step 5 Step 6 Step 7 Step 8 Step 9 Remove the 3 screws that secure the system fan to the heat sink Disconnect the power cable from the motherboard H Lift up the system fan to remove it Ej To install the new system fan a Line up the new system fan with the mounting holes on the heat sink and place it into position b Secure the new system fan to the heat sink with the 3 screws c Connect the new power cable to the connector on motherboard Reattach the base cover and secure it with the screws Replacing the heat sink Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the heat sink Step 1 Step 2 Step 3 Step 4 Step 5 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off
56. te a previously set Administrator Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Administrator Password and press the Enter key 3 The password dialog box will be displayed Type the current password and press the Enter key 4 Leave each new password line item blank then press the Enter key A Setup Notice will be displayed confirming that your changes have been saved 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save Changes and Exit from the menu Power On Password 14 IdeaCentre A520 All In One PCHardware Maintenance Manual When a Power On Password is set you cannot start the Lenovo BIOS Setup Utility program until a valid password is typed from the keyboard Setting changing or deleting a Power On Password Note A password can be any combination of letters and numbers up to 16 characters a z and 0 9 To set a Power On Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 From the Security menu select Set Power On Password and press the Enter key The password dialog box will be displayed Type the password then press the Enter key Re type the password to confirm it If you typed the password correctly the password will be installed
57. ter 8 eee hardware General information Bais Replacing the keyboard and mouse Replacing the power adapter Removing the base cover Replacing the hard disk drive Replacing a memory module Replacing the system fan Replacing the heat sink Replacing the CPU Replacing the optical drive Replacing the solid state disk Replacing the motherboard Replacing the speaker system Replacing the TV tuner card Replacing the battery Removing the hinge from the ES Removing the rear cover Replacing the scalar board Replacing the touch control board Replacing the converter board Replacing the power switch board Replacing the Bluetooth module Replacing the Wi Fi card Replacing the camera Replacing the front function beard Replacing the LED panel FRU lists Chapter 9 General information Additional Service Information 27 27 28 28 30 31 32 33 34 35 37 39 40 43 44 46 47 49 50 51 52 53 54 55 56 56 57 59 67 67 IV IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 1 About this manual This manual contains service and reference information for IdeaCentre A520 All In One computers listed on the cover It is intended only for trained servicers who are familiar with Lenovo computer products Before servicing a Lenovo product be sure to read the Safety Information The description of the TV tuner card in this manual applies only to computers with a TV tuner
58. ter key to exit the Lenovo BIOS Setup Utility program e If you do not want to save the settings select Discard Changes and Exit from the menu When the Reset Without Saving window shows select the Yes button and then press the Enter key to exit the Lenovo BIOS Setup Utility program Chapter 5 Using the Setup Utility 17 18 IdeaCentre A520 All In One PCHardware Maintenance Manual Chapter 6 Symptom to FRU Index The Symptom to FRU index lists error symptoms and possible causes The most likely cause is listed first Always begin with Chapter 4 General Checkout on page 11 This index can also be used to help you decide which FRUs to have available when servicing a computer If you are unable to correct the problem using this index go to Undetermined problems on page 20 Notes e If you have both an error message and an incorrect audio response diagnose the error message first e If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a POST error message diagnose the POST error message first e f you did not receive any error message look for a description of your error symptoms in the first part of this index Hard disk drive boot error A hard disk drive boot error can have the following causes The startup drive is not included in the boot sequence Check the configuration and ensure the startup drive is configuration in the boot sequence No operatin
59. the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the system fan Refer to Replacing the system fan 34 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 6 Remove the 9 screws that secure the heat sink to the motherboard Step 7 Lift up the heat sink to remove it Bd Attention Place the heat sink upside down on a flat surface to prevent thermal orease from contaminating other components Step 8 To install the new heat sink a Use an alcohol pad to wipe the thermal grease off the CPU b Line up the new heat sink with mounting holes on the motherboard c Secure the new heat sink to the motherboard with the 9 screws d Attach the system fan to the new heat sink and secure it with the screws Step 9 Reattach the base cover and secure it with the screws Replacing the CPU Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the CPU Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all atta
60. the new motherboard a Insert the battery CR2032 into the socket with the side labeled facing up and press the battery into place 7 A o 8 Ba E Z D A ee 7 f CPS f e f J Ee 7 a D ra WA j a Ee EL e f amp lt 7 Da di d J S N e YA L 5 S Se E 55 A e A SC e Ka Z YA PR a A Ea Sei x bn ZC N lt E ka a A b Insert the notched end of the TV Tuner card into the card port on the new motherboard and secure it with the 2 screws c Connect the antenna cable s to the TV Tuner card Line up the new motherboard with the chassis and slide it into position Align the holes on the new motherboard with the mounting holes on the chassis and secure it to the chassis with the screws e Attach the speakers to the chassis with the screws f Attach the solid state disk optical drive CPU heat sink system fan memory module and hard disk drive to the new motherboard g Connect all the cables to the new motherboard Step 20 Reattach the base cover and secure it with the screws 42 IdeaCentre A520 All In One PCHardware Maintenance Manual Replacing the speaker system Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the speaker system Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Remove any media disks CDs DVDs or memory cards from the d
61. to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Push the pins out to release the Bluetooth module then lift it up to remove it from the socket HE Disconnect the cable from the Bluetooth module E To install the new Bluetooth module a Connect the cable to the new Bluetooth module b Line up the new Bluetooth module with the socket snap it into position and secure it with the pins Reattach the rear cover to the LED panel 54 IdeaCentre A520 All In One PCHardware Maintenance Manual Step 11 Step 12 Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Replacing the Wi Fi card Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the Wi Fi card Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear vie
62. w for help with locating the various connectors Remove the base cover Refer to Removing the base cover Remove the hinge from the chassis Refer to Removing the hinge from the chassis Remove the rear cover Refer to Removing the rear cover Use a small flat head screwdriver to prise the Wi Fi card away from the socket HH Disconnect the antenna cable BH and data cable DH from the Wi Fi card To install the new Wi Fi card a Connect the data cable to the new Wi Fi card b Line up the new Wi Fi card with the socket snap it into position and secure it with the pins c Reconnect the antenna cable to the new Wi Fi card Reattach the rear cover to the LED panel Reattach the hinge to the chassis and reconnect the scalar headphone input scalar and DVI HDMI cables to the motherboard Reattach the base cover and secure it with the screws Chapter 8 Replacing hardware 55 Replacing the camera Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover To replace the camera Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to

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