Lenovo ThinkCentre Edge 91z - Replacing the Heat Sink Assembly

9.Connectthenewmicroprocessorfancabletothesystemboard.See“Systemboardpartsand
connectors”onpage88.
10.Reinstallthesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage102.
11.Reinstallthecomputercover.See“Removingthecomputercover”onpage95.
12.Goto“Completingthepartsreplacement”onpage127.
Replacingtheheatsinkassembly
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafety
information”intheThinkCentreEdgeSafetyandWarrantyGuidethatcamewithyourcomputer.Toobtaina
copyoftheThinkCentreEdgeSafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacetheheatsinkassembly.
CAUTION:
Theheatsinkandfanassemblymightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeremovingthecomputercover.
Toreplacetheheatsinkassembly,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Placeasoft,cleantowelorclothonthedeskorotheratsurface.Holdthesidesofyourcomputerand
gentlylayitdownsothatthescreenisagainstthesurfaceandthecoverisfacingup.
3.Removethecomputercover.See“Removingthecomputercover”onpage95.
4.Locatetheheatsinkassemblyonthesystemboard.See“FRUlocations”onpage86.
5.Removethesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage102.
6.Followthesequence1,2,3,4ontheheatsinkassemblytoloosethefourscrewsthatsecurethe
heatsinkassemblytothesystemboard.
Note:Carefullyloosethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkassembly.
Chapter8.ReplacingFRUs107