Lenovo ThinkCentre Edge 91 - Replacing the Microprocessor

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Figure67.Installingtheheatsinkfanduct
12.Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage141
Replacingthemicroprocessor
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacethemicroprocessor.
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeremovingthecomputercover.
Toreplacethemicroprocessor,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Removethecomputercover.See“Removingthecomputercover”onpage112.
3.Removetheheatsinkandfanassembly.See“Replacingtheheatsinkandfanassembly”onpage130.
Note:Placetheheatsinkandfanassemblyonitssidesothatthethermalgreaseonthebottomofit
doesnotgetincontactwithanything.
4.Locatethesystemboardanddisconnectallcablesconnectedtothesystemboard.See“Locatingparts
onthesystemboard”onpage109.
Chapter9.ReplacingFRUs(MachineTypes:1857,1893,and1895)133