
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Beforeyouopenthecomputercover,turnoff
thecomputerandwaitseveralminutesuntilthecomputeriscool.
Toreplacethesystemboard,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomputercover”onpage82.
3.Laythecomputeronitssideforeasieraccesstothesystemboard.
4.Removetheharddiskdrivefromthechassis.See“Replacingtheharddiskdrive”onpage84.
5.Removethepowersupplyassemblyfromthechassis.See“Replacingthepowersupplyassembly”
onpage93
.
6.RemoveallmemorymodulesandPCIcardsthatarecurrentlyinstalled.See“Installingorreplacinga
memorymodule”onpage105
and“InstallingorreplacingaPCIcard”onpage100.
7.Carefullytakenoteofthelocationsofallcableconnectionsonthesystemboardanddisconnectall
thecables.See“Locatingpartsonthesystemboard”onpage71.
8.Removetheheatsinkandfanassemblyfromthefailingsystemboard.See“Replacingtheheatsinkand
fanassembly”onpage96.
9.Removetheeightscrewsthatsecurethesystemboard.
Figure42.Removingtheeightscrewsthatsecurethesystemboard
10.Carefullyslidethesystemboardsothatitcanbereleasedfromthemountingstudsthatsecurethe
systemboardinplace.
11.Liftthesystemboardoutofthechassis.
108ThinkCentreE93HardwareMaintenanceManual
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