DELL Inspiron 3050
Contents
1. 1 notch 2 tab 3 memory module slot 4 memory module 21 Post requisites Replace the base cover 22 Removing the processor fan A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Prerequisites Remove the base cover Procedure 1 Remove the screws that secure the brackets to the system board 23 2 Liftthe brackets off the system board 1 screws 4 2 brackets 2 3 Remove the screws that secure the processor fan to the system board 24 4 Disconnect the processor fan cable from the system board and lift the processor fan off the system board 1 screws 2 2 processor fan processor fan cable 25 Replacing the processor fan A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory compliance Procedure 1 Connectthe processor fan cable to the system board2. 2 Align the screw holes on the processor fan with the screw holes on the system board 3 Replace the screws that secure the processor fan to the system board 4 Align the screw holes on the brackets with the screw holes on the system board 5 Replace the screws that secure the brackets to the system board Post requisites Replace the base cover 26 Removing the processor heat sink A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance A CAUTION For maximum cooling of the processor do not touch the heat transfer areas on the heat sink The oils in your skin can reduce the heat transfer capability of the thermal grease Prerequisites 1 Remove the base cover 2 Remove the processor fan Procedure 1 Loosen the captive screws that secure the processor heat sink to the system board 27 2 Liftthe processor heat sink off system board 1 processor heat sink 2 captive screws 4 28 Replacing the processor heat sink AN A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your
3. the hard drive Procedure 1 Slide the solid state drive firmly into the slot at an angle and gently press the solid state drive down until it snaps into position K NOTE Ensure that the solid state drive is firmly seated 2 Turn the system board over 3 Using the alignment posts on the top cover assembly snap the system board assembly into place Post requisites 1 Follow the procedure from step 4 to step 5 in Replacing the processor fan 2 Replace the base cover 43 Removing the hard drive A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance hard drive CAUTION To avoid data loss do not remove the hard drive while the A CAUTION Hard drives are fragile Exercise care when handling the A computer is in sleep or on state Prerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 44 Procedure 1 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly alignment posts 4 2 Using your fingertips gently release the securing tabs on the hard drive ca
4. Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance NOTE Your computer s Service Tag is stored in the system board You must enter the Service Tag in the BIOS setup program after you replace the system board NOTE Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program You must make the desired changes again after you replace the system board Procedure Place the system board on a clean flat surface Post requisites N Ou RUN r Replace the solid state drive Replace the coin cell battery Replace the wireless card Replace the memory module Replace the processor heat sink Replace the processor fan Replace the base cover 51 Removing the top cover assembly A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Prerequisites 1 Rem
5. Prerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 36 Procedure 1 2 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly 3 alignment posts 4 Disconnect the coin cell battery cable from the system board 37 3 Peel off the coin cell battery from the system board 1 coin cell battery connector 2 coin cell battery cable 5 coin cell battery 58 Replacing the coin cell battery A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure 1 Adhere the coin cell battery to the system board Connect the coin cell battery cable to the system board 3 Turn the system board assembly over and using the alignment posts snap the system board assembly into place Post requisites 1 Follow the procedure from step 4 to step 5 in Replacing the processor fan 2 Replace the base cover 39 Removing the solid state drive A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Be
6. information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure A CAUTION Place the computer on a soft and clean surface to avoid scratching the top cover 1 Turn the computer over 14 2 Remove the screws that secure the base cover to the top cover assembly 1 screws 4 2 base cover 3 Hold the base cover and gently loosen it to release the tabs that secure the base cover to the top cover assembly 15 4 Liftthe base cover off the top cover assembly 1 base cover 2 top cover assembly 3 tabs 4 16 Replacing the base cover A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure 1 Align the tabs on the top cover assembly with the slots on the base cover and snap the top cover assembly in place 2 Replace the screws that secure the base cover to the top cover assembly Turn the computer over 17 Removing the
7. memory module A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Prerequisites Remove the base cover Procedure 1 Use your fingertips to carefully spread apart the securing clips on each end of the memory module slot until the memory module pops up 18 2 Slide and remove the memory module from the memory module slot 1 memory module slot 2 securing clips 2 3 memory module 19 Replacing the memory module A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure 1 Align the notch on the memory module with the tab on the memory module slot 20 2 Slide the memory module firmly into the slot at an angle and gently press the memory module down until it clicks into place NOTE If you do not hear the click remove the memory module and reinstall it
8. stray screws remain inside your computer 2 Connect any external devices peripherals and cables you removed before working on your computer 3 Replace any media cards discs and any other parts that you removed before working on your computer 4 Connect your computer and all attached devices to their electrical outlets 5 Turn on your computer 10 Technical overview A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Inside view of your computer 1 processor heat sink 2 processor fan 3 system board 4 top cover assembly 11 5 memory module 6 brackets 2 System board components top view 1 memory module slot 2 processor fan cable connector CPU FAN 3 processor 12 System board components bottom view COPYRIGHT 201 T LL RIGHTS ss b gt www dell co 4 3 2 1 solid state drive slot NGF_SSD 2 CMOS and password reset jumper CMOS PW wireless card slot NGF_WLAN 4 coin cell battery hard drive cable connector 6 coin cell battery cable SATA HDD connector BATTERY 15 Removing the base cover A WARNING Before working inside your computer read the safety
9. to step 2 in Removing the processor fan 10 Replace the jumper plug to its original position 58 Post requisites 1 Follow the procedure from step 4 to step 5 in Replacing the processor fan 2 Replace the base cover Clearing CMOS Settings A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Prerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 59 Procedure 1 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly alignment posts 4 2 Locate the CMOS and password reset jumper CMOS PW on the system board NOTE For more information on the location of CMOS and password reset jumper see System board components 60 3 Remove the jumper plug and replace it on the CMOS jumper pins 1 jumper plug 2 CMOS jumper pins 3 password jumper pins 4 Follow the procedure from step 4 to step 5 in Replacing the processor fan 5 Replace the base cover 6 Turn on your computer and wait till the operating system is completely loaded 7 Shutdown you
10. Inspiron Micro Desktop 5000 Series Service Manual Computer Model Inspiron 3050 Regulatory Model D12U Regulatory Type D12U001 Notes cautions and warnings K NOTE A NOTE indicates important information that helps you make better use of your computer A CAUTION A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem A WARNING A WARNING indicates a potential for property damage personal injury or death Copyright 2015 Dell Inc All rights reserved This product is protected by U S and international copyright and intellectual property laws Dell and the Dell logo are trademarks of Dell Inc in the United States and or other jurisdictions All other marks and names mentioned herein may be trademarks of their respective companies 2015 04 Rev AOO Contents Before working inside your compulter 7 Before yo Degi racc e RP ce near een nie 7 Safety INStructions ee enm D ee ai eerte presto 8 Recommended tools c3 EAE O Ies Faure ho 9 After working inside your computer 10 Technical overview essent 11 Inside view of your computer sss nnns 11 System board components top view 12 System board components bottom VieW lt lt lt 15 Removing the base cover sess 14 Procedure oo emote enean t rte te ses tuts 14 Replacing the base
11. ble 3 Disconnect the hard drive cable from the system board 4 Remove the screws that secure the hard drive to the hard drive bay 45 5 Slide and lift the hard drive assembly off the hard drive bay 1 securing tabs 2 2 hard drive cable 3 hard drive assembly 4 hard drive bay 5 screws 4 46 6 Disconnect the interposer from the hard drive 1 interposer 2 hard drive 47 Replacing the hard drive A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance A CAUTION Hard drives are fragile Exercise care when handling the hard drive Procedure 1 Connect the interposer to the hard drive 2 Slide the hard drive assembly into the hard drive bay 3 Align the screw holes on the hard drive assembly with the screw holes on the hard drive bay 4 Replace the screws that secure the hard drive assembly to the hard drive bay 5 Slide the hard drive cable into the connector on the system board and push the securing tabs to secure the cable 6 Turn the system board assembly over and using the alignment posts snap the system board assembly into place Post requisites 1 Follow the procedure f
12. ble color scheme for the wireless card supported by your computer Connectors on the wireless card Antenna cable sticker color Main white triangle White Auxiliary black triangle Black 2 antenna cables 2 1 wireless card 3 wireless card slot 4 Press the other end of the wireless card down and slide the wireless card bracket into the wireless card 34 5 Align the screw hole on the wireless card bracket with the screw hole on the wireless card and replace the screw that secures the wireless card bracket to the wireless card 1 wireless card bracket 2 screw 6 Turn the system board assembly over and using the alignment posts snap the system board assembly into place Post requisites 1 Follow the procedure from step 4 to step 5 in Replacing the processor fan 2 Replace the base cover 35 Removing the coin cell battery A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance A CAUTION Removing the coin cell battery resets the BIOS setup program s settings to default It is recommended that you note the BIOS setup program s settings before removing the coin cell battery
13. computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance CAUTION For maximum cooling of the processor do not touch the heat transfer areas on the heat sink The oils in your skin can reduce the heat transfer capability of the thermal grease Procedure A Es CAUTION Incorrect alignment of the heat sink may damage the system board and processor NOTE The original thermal grease can be reused if the original processor and heat sink are reinstalled together If either the processor or the heat sink is replaced use the thermal grease provided in the kit to make sure that thermal conductivity is achieved 1 Align the captive screws on the processor heat sink with the screw holes on the system board 2 Tighten the captive screws that secure the processor heat sink to the system board Post requisites 1 Replace the processor fan 2 Replace the base cover 29 Removing the wireless card A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance P
14. cover eeseeeeeeseeess 17 Procedure ioi t ote tiet roa mcs see tt cc ee osten males alle 17 Removing the memory module sss 18 Prerequisites eer te en hue e nd et eei 18 Procedures si sostener dece mt Aalst oon e Ret cm 18 Replacing the memory module sss 20 Procedures oido tei a m uie o ea rU cx 20 Postsr quisites 4d tot ea t HR REPE eec Hines 22 Removing the processor fan eese 23 Preredquisites suco ten tec Mcrae ete EN em 23 PROCESS capstan cee eee att ate eee at ie Salen da E AEN 23 Replacing the processor fan esses 26 Procedure si docete aene m uentus tuus 26 Post requisites c tte e ie deep teo get ede ele nnde 26 Removing the processor heat sink 27 Pr r amp dlSitesu s aceites a nat o n 27 Procedure io topo t IRE mu RR 27 Replacing the processor heat sink 29 Procedule seem eere tU E LI E EAM Um Rae A 29 Post requisites s 2 tee Recette e eR UAR e oes 29 Removing the wireless card sees 350 Prerequisites sti oe eit bem er BE HO Pre oe e pede et e 50 PROCESU E zle RUANDA nak dano a da 351 Replacing the Wireless card eese 33 ProCed tr amp a ien pen i ene aan MI EE UT D C PERTH ER 33 PoStsrequisites inei knee ia eine M
15. ess card bracket with the screw hole on the wireless card and replace the screw that secures the wireless card bracket to the wireless card Post requisites 1 Follow the procedure from step 2 to step 6 in Replacing the hard drive Follow the procedure from step 4 to step 5 in Replacing the processor 3 Replace the base cover 54 BIOS setup program Overview A CAUTION Unless you are an expert computer user do not change the Ea settings in the BIOS setup program Certain changes can make your computer work incorrectly NOTE Before you change BIOS setup program it is recommended that you write down the BIOS setup program screen information for future reference Use BIOS setup program to Get information about the hardware installed in your computer such as the amount of RAM the size of the hard drive and so on Change the system configuration information Set or change a user selectable option such as the user password type of hard drive installed enabling or disabling base devices and so on Entering BIOS setup program 1 2 Turn on or restart your computer During POST when the DELL logo is displayed watch for the F2 prompt to appear and then press F2 immediately NOTE The F2 prompt indicates that the keyboard has initialized This prompt can appear very quickly so you must watch for it and then press F2 If you press F2 before the F2 prompt this keystroke is lost If you wait
16. fore working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance CAUTION Solid state drives are fragile Exercise care when handling the hard drive A CAUTION To avoid data loss do not remove the solid state drive while the computer is in sleep or on state Prerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 40 Procedure 1 2 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly 3 alignment posts 4 Using a plastic scribe push the securing tab to release the solid state drive 41 3 Slide and lift the solid state drive off the system board assembly 1 securing tab 2 plastic scribe 5 solid state drive 4 solid state drive slot 42 Replacing the solid state drive A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance A CAUTION Solid state drives are fragile Exercise care when handling
17. g Windows Help Information about Dell products and services Troubleshooting information user manuals setup instructions product specifications technical help blogs drivers software updates and so on Information about Microsoft Windows 8 1 Information about Microsoft Windows 7 Learn about your operating system setting up and using your computer data backup diagnostics and so on Contacting Dell Self Help Options Windows 8 1 Open the Search charm type Help and Support in the search box and press Enter Windows 7 Click Start Help and Support See dell com See dell com support See dell com windows8 Click Start All Programs Dell Help Documentation See Me and My Dell at dell com support manuals To contact Dell for sales technical support or customer service issues see dell com contactdell 64 K NOTE Availability varies by country and product and some services may not be available in your country K NOTE If you do not have an active internet connection you can find contact information on your purchase invoice packing slip bill or Dell product catalog 65
18. hould only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team Damage due to servicing that is not authorized by Dell is not covered by your warranty See the safety instructions that shipped with the product or at dell com regulatory_compliance CAUTION Before touching anything inside your computer ground yourself by touching an unpainted metal surface While you work periodically touch an unpainted metal surface to dissipate static electricity which could harm internal components CAUTION When you disconnect a cable pull on its connector or on its pull tab not on the cable itself Some cables have connectors with locking tabs or thumb screws that you must disengage before disconnecting the cable When disconnecting cables keep them evenly aligned to avoid bending any connector pins When connecting cables ensure that the ports and connectors are correctly oriented and aligned CAUTION To disconnect a network cable first unplug the cable from your computer and then unplug the cable from the network device CAUTION Press and eject any installed card from the media card reader Recommended tools The procedures in this document may require the following tools e Philips screwdriver Plastic scribe After working inside your computer X CAUTION Leaving stray or loose screws inside your computer may severely damage your computer 1 Replace all screws and ensure that no
19. i ido Z deta Bates 35 Removing the coin cell battery sssss 36 Prerequisites tee te tet ode ter e tre ied erede d es 56 Procedure doo e tuv n o be 37 Replacing the coin cell battery 39 Procedure o0 du eee num menu ar e ie thee M a M aru 39 Post requisites d edge p eU RE elon ia teased ode Hrs 59 Removing the solid state drive 40 Prerequisites en z UART P esee Ti n D rn i e RO Rt s 40 Procedure PR M EE 41 Replacing the solid state drive 43 bIrerei te U i e 43 Postsredquisites eii iicet ette dece egent ted vlde ent 43 Removing the hard drive eene 44 Prerequisites eter ve ee ctae ten e EN PR ce ERR 44 e isro te V i r roura 45 Replacing the hard drive esee 48 ProCedUte scuto ote aea RR RR ee SO nd ESR EA 48 Post reguisit S 3 ee Re e RR idet 48 Removing the system board sees 49 Prer amp quisites sioe tibi bc ettam cet teet rete ee d toc erts enia 49 nitolee 3 at CERE lac ees 49 Replacing the system board eese 51 Proced reninu 51 PoStsrequisites iere o vete DEO SU De Dind fuia Aen BC EEUU Aaa 51 Removing the top cover assembWly 52 Pre
20. ove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 3 Follow the procedure from step 1 to step 5 in Removing the hard drive Procedure 1 Remove the screw that secures the wireless card bracket to the wireless card 2 Liftthe wireless card bracket off the wireless card 3 Disconnect the antenna cables from the wireless card 52 4 Liftthe top cover assembly and keep it aside top cover assembly 2 antenna cables 2 wireless card bracket 4 screw 1 top cover assembly 55 Replacing the top cover assembly A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure 1 Press the other end of the wireless card down and connect the antenna cables to the wireless card The following table provides the antenna cable color scheme for the wireless card supported by your computer Connectors on the wireless card Antenna cable sticker color Main white triangle White Auxiliary black triangle Black 2 Pressthe other end of the wireless card down and place the wireless card bracket on the wireless card 3 Align the screw hole on the wirel
21. r computer co Remove the base cover 9 Follow the procedure from step 1 to step 2 in Removing the processor fan 10 Replace the jumper plug to its original position 61 Post requisites 1 Follow the procedure from step 4 to step 5 in Replacing the processor fan 2 Replace the base cover 62 Flashing the BIOS You may need to flash update the BIOS when an update is available or when you replace the system board To flash the BIOS 1 2 3 Turn on the computer Go to dell com support Click Product Support enter the Service Tag of your laptop and click Submit NOTE If you do not have the Service Tag use the auto detect feature or manually browse for your computer model Click Drivers amp downloads Scroll down the page and select BIOS from the Category drop down list NOTE In the Change OS drop down list select the operating system installed on your computer Expand BIOS to view the available BIOS files Click Download File to download the latest version of the BIOS for your computer Save the file and once the download is complete navigate to the folder where you saved the BIOS update file Double click the BIOS update file icon and follow the instructions on the screen 63 Getting help and contacting Dell Self help resources You can get information and help on Dell products and services using these online self help resources Self Help Information Accessin
22. requlsites c e ee t b terere iet e etr jedne 52 Procedures ee tdt tute tuat ebat 52 Replacing the top cover assembWly 54 Procedure PE 54 Postsredulsites aot erede t d IR inland Borse n es 54 BIOS setup progralri iren tiernd epe eura rey Yee inedia deea 55 e DENM 55 Entering BIOS setup program mener 55 Clearing Forgotten Passwords pae t Mee ai 56 Prerequisites 34 Sce cL e d t obale banan 56 Pr ced re DI E m 57 Post requisites s Le ba dene atre D UTE ied 59 Glearing CMGS Settlngs 365g Padne ea ae Pr Giada 59 Pr requisites c eec dz lane Aiea adn id de 59 Procedures ette teet etd Haad de tet schede 60 Postsrequisites e rege eta eo ee t e e eet etre 62 Flashing the BIOS e terr radere tt rti e ceip ares 63 Getting help and contacting DelL 64 Self rielpiteSources c sioe cette bee AEA re E RO a ed 64 Contacting Dell tenti ro Ett terc dec ote P ted brad ied 64 Before working inside your computer A 7 CAUTION To avoid damaging the components and cards handle them by their edges and avoid touching pins and contacts NOTE The images in this document may differ from your computer depending on the configuration you ordered Before you begin 1 Save and close all open files and exit all open applications Shut down your computer Windows 8 1 On the Start screen click or tap the power icon o M Shut do
23. rerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 30 Procedure 1 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly alignment posts 4 2 Remove the screw that secures the wireless card bracket to the wireless card Slide and lift the wireless card bracket off the wireless card 4 Disconnect the antenna cables from the wireless card 31 5 Slide and remove the wireless card from the wireless card slot wireless card bracket 2 antenna cables 2 Screw 4 wireless card wireless card slot 32 Replacing the wireless card A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Procedure A CAUTION To avoid damage to the wireless card do not place any cables under it 1 Align the notch on the wireless card with the tab on the wireless card slot 2 Slide the wireless card at an angle into the wireless card slot 33 Press the other end of the wireless card down and connect the antenna cables to the wireless card The following table provides the antenna ca
24. rom step 4 to step 5 in Replacing the processor fan 2 Replace the base cover 48 Removing the system board A Ea Ea Ea WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory compliance NOTE Your computer s Service Tag is stored in the system board You must enter the Service Tag in the BIOS setup program after you replace the system board NOTE Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program You must make the desired changes again after you replace the system board NOTE Before disconnecting the cables from the system board note the location of the connectors so that you can reconnect them correctly after you replace the system board Prerequisites NOU R UN F Remove the base cover Remove the processor fan Remove the processor heat sink Remove the memory module Remove the wireless card Remove the coin cell battery Remove the solid state drive Procedure After performing all the steps in prerequisites we are left with the system board 49 1 50 system board Replacing the system board A Ea Es WARNING
25. too long and the operating system logo appears continue to wait until you see the operating system s desktop Then turn off your computer and try again 55 Clearing Forgotten Passwords A WARNING Before working inside your computer read the safety information that shipped with your computer and follow the steps in Before working inside your computer After working inside your computer follow the instructions in After working inside your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance Prerequisites 1 Remove the base cover Follow the procedure from step 1 to step 2 in Removing the processor fan 56 Procedure 1 Carefully lift the system board assembly and turn it over 1 top cover assembly 2 system board assembly alignment posts 4 2 Locate the CMOS and password reset jumper CMOS PW on the system board For more information on the location of CMOS and password reset jumper see System board components 57 3 Remove the jumper plug and replace it on the password jumper pins 1 jumper plug 2 CMOS jumper pins 3 password jumper pins 4 Follow the procedure from step 4 to step 5 in Replacing the processor fan 5 Replace the base cover 6 Turn on your computer and wait till the operating system is completely loaded 7 Shutdown your computer Remove the base cover 9 Follow the procedure from step 1
26. wn Windows 7 Click or tap Start Shut down NOTE If you are using a different operating system see the documentation of your operating system for shut down instructions Disconnect your computer and all attached devices from their electrical outlets Disconnect all cables such as telephone cables network cables and so on from your computer Disconnect all attached devices and peripherals such as keyboard mouse monitor and so on from your computer Remove any media card and optical disc from your computer if applicable After the computer is unplugged press and hold the power button for 5 seconds to ground the system board Safety instructions Use the following safety guidelines to protect your computer from potential damage and ensure your personal safety A A gt gt D WARNING Before working inside your computer read the safety information that shipped with your computer For more safety best practices see the Regulatory Compliance home page at dell com regulatory_compliance WARNING Disconnect all power sources before opening the computer cover or panels After you finish working inside the computer replace all covers panels and screws before connecting to the power source CAUTION To avoid damaging the computer ensure that the work surface is flat and clean CAUTION To avoid damaging the components and cards handle them by their edges and avoid touching pins and contacts CAUTION You s
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