Safety,Warranty,andSetupGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacetheheatsinkassembly.
CAUTION:
Theheatsinkandfanassemblymightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeremovingthecomputercover.
Toreplacetheheatsinkassembly,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Placeasoft,cleantowelorclothonthedeskorotheratsurface.Holdthesidesofyourcomputerand
gentlylayitdownsothatthescreenisagainstthesurfaceandthecoverisfacingup.
3.Removethecomputercover.See“Removingthecomputercover”onpage71.
4.RemovetheVESAmountbracket.See“RemovingandreinstallingtheVESAmountbracket”onpage71.
5.Locatetheheatsinkassemblyonthesystemboard.See“LocatingmajorFRUsandCRUs”onpage63.
6.Removethesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage76.
7.Removethescrew5,andthenfollowthesequence1,2,3,4ontheheatsinkassemblytoloosethe
fourscrewsthatsecuretheheatsinkassemblytothesystemboard.
Note:Carefullyloosethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkassembly.
Figure20.Loosingthescrewsthatsecuretheheatsinkassemblytothesystemboard
Chapter9.ReplacingFRUs79
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