5.Followthissequencetoremovethefourscrewsthatsecuretheheatsinkandfanassemblytothe
systemboard:
a.Partiallyremovescrew1,thenfullyremovescrew2,andthenfullyremovescrew1.
b.Partiallyremovescrew3,thenfullyremovescrew4,andthenfullyremovescrew3.
Note:Carefullyremovethefourscrewsfromthesystemboardtoavoidanypossibledamagetothe
systemboard.Thefourscrewscannotberemovedfromtheheatsinkandfanassembly.
Figure33.Removingtheheatsinkandfanassembly
6.Lifttheheatsinkandfanassemblyoffthesyst emboard.
Notes:
a.Youmighthavetogentlytwisttheheatsinkandfanassemblytofreeitfromthemicroprocessor .
b.Whenhandlingtheheatsinkandfanassembly,donottouchthethermalgreaseonthebottom
oftheheatsinkandfanassembly.
7.Placethenewheatsinkandfanassemblyonthesystemboardsothatthefourscrewsarealigned
withthecorrespondingholesinthesystemboard.Makesurethatyouproperlyplacethenewheat
sinkandfanassemblysothatyoucaneasilyconnectthenewheatsinkandfanassemblycabletothe
microprocessorfanconnectoronthesystemboard.
8.Followthefollowingsequencetoinstallthefourscrewstosecurethenewheatsinkandfanassembly .
Donotover-tightenthescrews.
a.Partiallytightenscrew1,thenfullytightenscrew2,andthenfullytightenscrew1.
b.Partiallytightenscrew3,thenfullytightenscrew4,andthenfullytightenscr ew3.
9.Connectthenewheatsinkandfanassemblycabletothemicroprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage11.
Chapter5.Installingorreplacinghardware49