Replacingthesystemboard
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacethesystemboard.
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeopeningthecomputercover.
Toreplacethesystemboard,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomputercover”onpage79.
3.Laythecomputeronitssideforeasieraccesstothesystemboard.
4.Removetheharddiskdrivefromthechassis.See“Replacingtheprimaryharddiskdrive”onpage
103
.Removethesecondaryharddiskdriveifyourmodelhasone.See“Replacingthesecondary
harddiskdrive”onpage105.
5.RemoveallmemorymodulesandPCIcardsthatarecurrentlyinstalled.See“Installingorreplacinga
memorymodule”onpage84and“InstallingorreplacingaPCIcard”onpage81.
6.Carefullytakenoteofthelocationofallcableconnectionsonthesystemboardanddisconnectallthe
cables.See“Locatingpartsonthesystemboard”onpage77.
7.Removetheheatsinkandfanassemblyfromthefailingsystemboard.See“Replacingtheheatsinkand
fanassembly”onpage95.
8.Removetheeightscrewsthatsecurethesystemboard.
100ThinkCentreHardwareMaintenanceManual
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