Lenovo Personal Computer 4155 Bedienungsanleitung PDF herunterladen (Seite 132)

8.Closethemicroprocessorretainerandclampitwiththesmallhandle.

9.Placetheheatsinkintopositionandreplacethe4screwstosecuretheheatsinktothesystemboard.

10.Reconnecttheheatsinkfancable.

11.Goto“CompletingtheFRUreplacement”onpage108.

Replacingthesystemboard

CAUTION:

Theheatsink,microprocessor,andmemorymodulemightbeveryhot.Turnoffthe

computerandwaitthreetoveminutestoletthecomputercoolbeforeopeningthecomputercover.

Attention

Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”

intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkStation

SafetyandWarrantyGuide,goto:

http://www.lenovo.com/support.

Note:Whenreplacingthesystemboardanewretentionmoduleforthemicroprocessorheatsinkisrequired.

Makesureyouhaveanewretentionmodulebeforebeginningthisprocedure.

Thissectionprovidesinstructionsonhowtoremoveandinstallthesystemboard.

Toreplacethesystemboard:

1.Openthecover.See“Removingthecover”onpage78.

2.Laythecomputeronitssideforeasieraccesstothesystemboard.

3.Removetheharddiskdrivefan.See“Replacingtheharddiskdrivefanassembly”onpage100.

4.RemoveanyadaptercardsinstalledinthePCIconnectors.See“ReplacingaPCIadaptercard”on

page86.

5.Removethememorymodulesfromthefailingsystemboard.

6.Removetheheatsinkfromthefailingsystemboard.See“Replacingtheheatsink”onpage90.

7.Notethelocationofallcableconnectionsonthesystemboardanddisconnectallcables.See“Locating

partsonthesystemboard”onpage113

8.Removetheninescrewsthatsecurethesystemboardtothechassis,followingthesequenceshownin

thegure:

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Lenovo Personal Computer 4155 Bedienungsanleitung Seite 132