
19.Useacleaningpadtowipethethermalgreasefromtheheatsinksandthetopofthemicroprocessors.
Disposeofthecleaningpadafterallofthethermalgreaseisremoved.
20.Useoneofthefollowingmethodstoapplyappropriateamountofthermalgreasetothetopofthe
microprocessorsintheshapeofacrossoracircleasshown.Usingtoomuchortoolittlethermalgrease
cancauseathermalproblemduetoimperfectcontactwiththecomponents.
Notes:
•Donottouchthethermalgrease.
•Keepthethermalgreaseoffthesystemboard.
Figure126.Applyingthethermalgreasetothetopofthemicroprocessor
21.Installtheheatsinksonthenewsystemboard.See“Replacingtheheatsink”onpage154.
22.Theoldsystemboardmustbereturnedwithtwomicroprocessorsocketcoverstoprotectthepinson
themicroprocessorsocketsduringshippingandhandling.Usethemicroprocessorsocketcovers
removedfromthenewsystemboard.
Toinstallamicroprocessorsocketcoverontheoldsystemboard,dothefollowing:
a.Closethemicroprocessorretainer.Pressdownthesmallhandle1firstandthenpushthehandle
inwardtosecureit.Then,pressdownthesmallhandle2andthenpushthehandleinwardto
lockthemicroprocessorretainerintoposition.
Note:Therearetwomarksonthemicroprocessorretainer.Ensurethatyouclosethesmallhandle
markedwith
firstandthenclosetheothersmallhandlemarkedwith.Alwaysfollowthecorrect
sequencewhenyouclosethesmallhandles.
Figure127.Securingthemicroprocessorretainer
Chapter6.Replacinghardware161
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