Lenovo ThinkCentre Edge 91z - Replacing the Microprocessor

Figure28.Loosingthefourscrewsthatsecuretheheatsinkassemblytothesystemboard
7.Liftthefailingheatsinkassemblyoffthesystemboard.
Notes:
a.Youmighthavetogentlytwisttheheatsinkassemblytofreeitfromthemicroprocessor.
b.Donottouchthethermalgreasewhilehandlingtheheatsinkassembly.
8.Toreinstalltheheatsinkassembly,positionthenewheatsinkassemblyonthesystemboardsothatthe
fourscrewsarealignedwiththecorrespondingholesinthesystemboard.
9.Followthesequence1,2,3,4ontheheatsinkassemblytotightenthefourscrewstosecuretheheat
sinkassemblytothesystemboard,asshowninFigure28“Loosingthefourscrewsthatsecuretheheat
sinkassemblytothesystemboard”onpage108.
10.Reinstallthesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage102.
11.Goto“Completingthepartsreplacement”onpage127.
Replacingthemicroprocessor
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafety
information”intheThinkCentreEdgeSafetyandWarrantyGuidethatcamewithyourcomputer.Toobtaina
copyoftheThinkCentreEdgeSafetyandWarrantyGuide,goto:
http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacethemicroprocessor.
CAUTION:
Theheatsinkandfanassemblymightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeremovingthecomputercover.
Toreplacethemicroprocessor,dothefollowing:
108ThinkCentreHardwareMaintenanceManual