User's Manual

7.Reversethisproceduretoinstallthecard.
8.Goto“CompletingtheFRUreplacement”onpage108.
Replacingtheheatsink
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwait
threetoveminutestoletthecomputercoolbeforeopeningthecomputercover.
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkStation
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support.
Thissectionprovidesinstructionsonhowtoreplaceandinstalltheheatsink.
Toreplacetheheatsink:
1.Openthecomputercover.See“Removingthecover”onpage78.
2.Laythecomputeronitssideforeasieraccesstotheheatsink.
3.Removetheheatsinkandfanassemblycablesfromthesystemboard.Notethecablelocation.See
“Locatingpartsonthesystemboard”onpage113.
4.Followthissequencetoremovetheheatsinkfromthesystemboard:
a.Partiallyremovescrew1,thenfullyremovescrew2,andfullyremovescrew1.
b.Partiallyremovescrew3,thenfullyremovescrew4,andfullyremovescrew3.
5.Carefullylifttheheatsinkoffofthesystemboard.
6.Removetheplasticcoverfromthebottomofthenewheatsinktoexposetheheatsinkgrease(this
coverprotectstheheatsinkgreasefromcontamination).
Chapter11.ReplacingFRUs(Type4155,4158,4218)121