Lenovo computer hardware 9421 Manual

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480 Pages English

Lenovo computer hardware 9421
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480
8.Replacethefrontbezel.
9.Goto"CompletingtheFRUreplacement"onpage113.
Replacingthefrontaudio/USBassembly
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe"Importantsafetyinformation"
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:http://www.lenovo.com/support
Thissectionprovidesinformationonhowtoremoveandreplacethefrontaudio/USBassembly.
Toremoveorreplacethefrontaudio/USBassembly,dothefollowing:
1.Removethecomputercover.See"Removingthecover"onpage68.
2.Removethefrontbezel.See"Removingandreplacingthefrontbezel"onpage71
3.Disconnectthefrontaudio/USBassemblycablefromthesystemboard.See"Locatingpartsonthe
systemboard"onpage71.
4.Notethefrontaudio/USBassemblycableroutingandremovethescrewthatsecurestheassemblyto
thechassis.
5.Removethefrontaudio/USBassembly.
6.Routethecableforthenewfrontaudio/USBassemblythroughtheholeinthechassisandtothesystem
board.
7.Installthefrontaudio/USBassemblyintothechassisandsecureitwiththescrew.
8.Connectthefrontaudio/USBassemblycabletothesystemboard.
9.Reinstallthefrontbezel.
10.Goto"CompletingtheFRUreplacement"onpage91.
Replacingthepowerswitch/LEDassembly
Attention
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe"Importantsafetyinformation"
intheThinkCentreSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkCentre
SafetyandWarrantyGuide,goto:http://www.lenovo.com/support
Thissectionprovidesinformationonhowtoremoveandreplacethepowerswitch/LEDassembly.
Toremoveorreplacethepowerswitch/LEDassembly,dothefollowing:
1.Removethecomputercover.See"Removingthecover"onpage68.
2.Removethefrontbezel.See"Removingandreplacingthefrontbezel"onpage71
3.Disconnectthepowerswitch/LEDassemblycablefromthesystemboard.See"Locatingpartsonthe
systemboard"onpage71.
4.Notethepowerswitch/LEDassemblycableroutingandthepositionofthetwoLEDs.
5.RemovetheswitchandtheLEDsfromthebezel.
6.Routethecableforthenewpowerswitch/LEDassemblythroughtheholeinthechassisandtothe
systemboard.
7.Installthenewpowerswitch/LEDassemblyintothebezel.MakesurethattheLEDsareinthecorrect
position.
8.Connectthepowerswitch/LEDcabletothesystemboard.
Chapter8ReplacingFRUs(Types7061,7090,9353,9421,9485,9623,9625,9705,9786,9795,9935,9946,9953)89
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