User manual

12.Reinstalltheheatsinkandfanassemblywiththefanductasshown.See“Replacingtheheatsinkand
fanassembly”onpage139.
Figure88.Reinstallingtheheatsinkandfanassemblywiththefanduct
13.Reconnectallcablesthatweredisconnectedfromthesystemboard.
14.Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage160.
Replacingthesystemboard
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacethesystemboard.
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeopeningthecomputercover.
Toreplacethesystemboard,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Openthecomputercover.See“Openingthecomputercover”onpage121.
3.Removethefrontbezel.See“Removingandreinstallingthefrontbezel”onpage122.
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