Laptop User Manual

Table Of Contents
Toreplacetheheatsinkandfanassembly,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Removethecomputercover.See“Removingthecomputercover”onpage34.
3.Laythecomputeronitssideforeasieraccesstothesystemboard.
4.Locatetheheatsinkandfanassembly.See“Locatingpartsonthesystemboard”onpage13.
5.Disconnecttheheatsinkandfanassemblycablefromthemicroprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage13.
6.Followthissequencetoremovethefourscrewsthatsecuretheheatsinkandfanassemblytothe
systemboard:
a.Partiallyremovescrew1,thenfullyremovescrew2,andthenfullyremovescrew1.
b.Partiallyremovescrew3,thenfullyremovescrew4,andthenfullyremovescrew3.
Note:Carefullyremovethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkandfanassembly.
Figure32.Removingtheheatsinkandfanassembly
7.Liftthefailingheatsinkandfanassemblyoffthesystemboard.
Notes:
a.Youmighthavetogentlytwisttheheatsinkandfanassemblytofreeitfromthemicroprocessor.
b.Donottouchthethermalgreasewhilehandlingtheheatsinkandfanassembly.
8.Positionthenewheatsinkandfanassemblyonthesystemboardsothatthefourscrewsarealigned
withtheholesonthesystemboard.
Note:Positionthenewheatsinkandfanassemblysothattheheatsinkandfanassemblycableis
towardthemicroprocessorfanconnectoronthesystemboard.
9.Followthefollowingsequencetoinstallthefourscrewstosecurethenewheatsinkandfanassembly.
Donotover-tightenthescrews.
50ThinkCentreUserGuide