Computer Hardware User Manual

Figure18.Removingtheheatsink
4.Placethenewheatsinkonthesystemboardsothatthefourscrewsarealignedwiththefour
correspondingmountingstudsonthesystemboard.
5.Alternatetighteningeachscrewasmallandequalamountuntiltheheatsinkissecuredtothesystem
board.Donotover-tightenthescrews.
Whattodonext:
•Toworkwithanotherpieceofhardware,gototheappropriatesection.
•Tocompletethereplacement,goto“Completingthepartsreplacement”onpage84.
Replacingthesystemfanassembly
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:http://www.lenovo.com/support
Thissectionprovidesinstructionsonhowtoreplacethesystemfanassembly.
Toreplacethesystemfanassembly,dothefollowing:
1.Removethecomputercover.See“Removingthecomputercover”onpage68.
2.Disconnectthesystemfanassemblycablefromthesystemfanconnectoronthesystemboard.See
“Locatingpartsonthesystemboard”onpage67.
3.Youmighthavetoremovetheharddiskdrivetogainaccesstothesystemfanassembly.See
“Replacingtheharddiskdrive”onpage73.
4.Breakorcuttherubbermountsthatsecurethesystemfanassemblytothechassis.Then,remove
thesystemfanassemblyoutofthecomputer.
Chapter8.ReplacingFRUs77