b.Partiallytightenscrew3,thenfullytightenscr ew4,andthenfullytightenscrew3.
10.Connecttheheatsinkandfanassemblycabletothemicr oprocessorfanconnectoronthesystem
board.See“Locatingpartsonthesystemboard”onpage11.
Whattodonext:
•Toworkwithanotherpieceofhar dware,gototheappr opriatesection.
•Tocompletetheinstallationorreplacement,got o“Completingthepartsreplacement”onpage63.
Replacingthemicroprocessor
Attention:Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Important
safetyinformation”onpagev.
Thissectionprovidesinstructionsonhowtoreplacethemicroprocessor.
CAUTION:
Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwaitthreetove
minutestoletthecomputercoolbeforeremovingthecomputercover.
Toreplacethemicroprocessor,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Removethecomputercover.See“Removingthecomputercover”onpage32.
3.Laythecomputeronitssideforeasieraccesstothesystemboar d.
4.Locatethesystemboardanddisconnectallcablesconnectedt othesystemboard.See“Locating
partsonthesystemboard”onpage11.
5.Removetheheatsinkandfanassembly .See“Replacingtheheatsinkandfanassembly”onpage47.
Note:Placetheheatsinkandfanassemblyonitssidesothatthethermalgr easeonthebottomofit
doesnotgetincontactwithanything.
Chapter5.Installingorreplacinghardware49