Computer Hardware User Manual

5.Carefullypresstheothersideofthesocketcoverdownwardsuntilthesocketcoversnapsintoplace.
Figure91.Securingthesocketcover
6.Carefullycheckthefourcornersofthesocketcovertomakesurethatthecoverissecuredinthe
microprocessorsocket.
7.Lowerthemicroprocessorretainerandthenlowerthelevertosecuretheretainer.Makesurethe
leverislockedintoposition.
8.Followanyadditionalinstructionsincludedwiththereplacementpartyoureceived.
Replacingthesystemfanassembly
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacethesystemfanassembly.
Toreplacethesystemfanassembly,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Openthecomputercover.See“Openingthecomputercover”onpage121.
3.Removetheharddiskdrive.See“Replacingtheharddiskdrive”onpage134.
4.Locatethesystemfanassembly.See“Locatingcomponents”onpage118.
5.Disconnectthesystemfanassemblycablefromthesystemfanconnectoronthesystemboard.See
“Locatingpartsonthesystemboard”onpage77.
Chapter9.ReplacingFRUs(MachineTypes:4466,4471,4474,4477,4480,4485,4496,4498,4503,4512,4514,
4518,4554,7005,7023,7033,7035,7072,7079,and7177.)153