User's Manual
9.Placetheheatsinkintopositionandreplacethe4screwstosecuretheheatsinktothesystemboard.
10.Reconnecttheheatsinkfancable.
11.Goto“CompletingtheFRUreplacement”onpage108.
Replacingthesystemboard
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwait
threetoveminutestoletthecomputercoolbeforeopeningthecomputercover.
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkStation
SafetyandWarrantyGuide,goto:
http://www.lenovo.com/support.
Note:Whenreplacingthesystemboardanewretentionmoduleforthemicroprocessorheatsinkisrequired.
Makesureyouhaveanewretentionmodulebeforebeginningthisprocedure.
Thissectionprovidesinstructionsonhowtoremoveandinstallthesystemboard.
Toreplacethesystemboard:
1.Openthecover.See“Removingthecover”onpage78.
2.Laythecomputeronitssideforeasieraccesstothesystemboard.
3.RemoveanyadaptercardsinstalledinthePCIconnectors.See“ReplacingaPCIadaptercard”on
page86.
4.Removetheharddiskdrivefan.See“Replacingtheharddiskdrivefanassembly”onpage100.
5.Removethememorymodulesfromthefailingsystemboard.
6.Removetheheatsinkfromthefailingsystemboard.See“Replacingtheheatsink”onpage90.
7.Notethelocationofallcableconnectionsonthesystemboardanddisconnectallcables.See“Locating
partsonthesystemboard”onpage81.
8.Removetheninescrewsthatsecurethesystemboardtothechassis,followingthesequenceshownin
thegure:
94ThinkStationHardwareMaintenanceManual