Lenovo ThinkStation C20 - Replacing the System Board

13.ReinstallthePCIcardholderintothechassis.See“RemovingandreinstallingthePCIcardholder”
onpage76.
14.Reinstallthefrontbezel.See“Removingandreinstallingthefrontbezel”onpage75.
15.Tocompletethereplacement,goto“Completingthepartsreplacement”onpage110.
Replacingthesystemboard
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafety
information”intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.Toobtainacopy
oftheThinkStationSafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacethesystemboard.
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwait
threetoveminutestoletthecomputercoolbeforeremovingthecomputercover.
Note:Beforereplacingthesystemboard,makesureyouhavearetentionmoduleforthenewsystemboard.
Toreplacethesystemboard,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomputercover”onpage74.
3.Removethefrontbezel.See“Removingandreinstallingthefrontbezel”onpage75.
4.Placethecomputeronitssidetogaineasieraccesstothesystemboard.
5.RemovethePCIcardholder.See“RemovingandreinstallingthePCIcardholder”onpage76.
6.Removetheopticaldriveandtheopticaldrivebracket.See“Replacingtheopticaldrive”onpage88.
7.RemoveallmemorymodulesandPCIcardsthatarecurrentlyinstalled.See“Installingorreplacinga
memorymodule”onpage78and“InstallingorreplacingaPCIcard”onpage82.
8.Removetheheatsinkandfanassemblyfromthefailingsystemboard.See“Replacingtheheatsinkand
fanassembly”onpage90.
9.Removethemicroprocessorfromthefailingsystemboard.See“Replacingthemicroprocessor”on
page93.
10.Removethebatteryfromthefailingsystemboard.See“Replacingthebattery”onpage98.
11.Removethefrontfanassemblyfromthecomputer.See“Replacingthefrontfanassembly”onpage104.
12.Notethelocationofallcableconnectionsonthesystemboardanddisconnectallcables.See“Locating
partsandconnectorsonthesystemboard”onpage71.
13.Removethethreescrews1thatsecurethememorychillerframe.Removethethreescrews2that
securetheothermemorychillerframe.Then,removethetwoscrews3thatsecuretheblackcableclip.
Chapter9.ReplacingFRUs95