Lenovo THINKCENTRE 4485 Bedienungsanleitung PDF herunterladen (Seite 105)

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10.Connecttheheatsinkandfanassemblycabletothemicroprocessorfanconnectoronthesystem

board.See“Locatingpartsonthesystemboard”onpage77.

11.Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage113.

Replacingthemicroprocessor

Attention:

Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”

intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:

http://www.lenovo.com/ThinkCentreUserGuides

Thissectionprovidesinstructionsonhowtoreplacethemicroprocessor.

CAUTION:

Theheatsinkandmicroprocessormightbeveryhot.Turnoffthecomputerandwaitthreetove

minutestoletthecomputercoolbeforeremovingthecomputercover.

Toreplacethemicroprocessor,dothefollowing:

1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect

allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.

2.Removethecomputercover.See“Removingthecomputercover”onpage79.

3.Laythecomputeronitssideforeasieraccesstothesystemboard.

4.Locatethesystemboardanddisconnectallcablesconnectedtothesystemboard.See“Locating

partsonthesystemboard”onpage77.

5.Removetheheatsinkandfanassembly.See“Replacingtheheatsinkandfanassembly”onpage95.

Note:Placetheheatsinkandfanassemblyonitssidesothatthethermalgreaseonthebottomofit

doesnotgetincontactwithanything.

Chapter8.ReplacingFRUs(MachineTypes:4468,4473,4476,4479,4495,4497,4499,4504,4513,4517,4524,

7021,7032,7034,7049,7052,7053,7073,7136,and7178.)97

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