Lenovo 4163 User Manual Page 31

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1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomputercover”onpage14.
3.Removethefrontbezel.See“Removingandreinstallingthefrontbezel”onpage14.
4.Pivotthedrivebayassemblyupward.Removethetwoscrewsthatsecuretheheatsinkfanductand
thenlifttheheatsinkfanductuptoremoveitfromthechassis.
Figure18.Removingtheheatsinkfanduct
5.Disconnecttheheatsinkandfanassemblycablefromthemicroprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage9
.
6.Followthissequencetoremovethefourscrewsthatsecuretheheatsinkandfanassemblytothe
systemboard:
a.Partiallyremovescrew1,thenfullyremovescrew2,andthenfullyremovescrew1.
b.Partiallyremovescrew3,thenfullyremovescrew4,andthenfullyremovescrew3.
Note:Carefullyremovethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkandfanassembly.
Chapter2.Installingorreplacinghardware23
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