Lenovo 3120, 3122, 3126, 3128 - page 56

1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Openthecomputercover.See“Openingthecomputercover”onpage14.
3.Removethefrontbezel.See“Removingandreinstallingthefrontbezel”onpage15.
4.PivottheopticaldrivebayupwardanddisconnectthefrontaudioandUSBassemblycablesfromthe
systemboardandnotethecablesrouting.See“Locatingpartsonthesystemboard”onpage10.
5.RemovethescrewthatsecuresthefrontaudioandUSBassemblybracket.Thenremovethefront
audioandUSBassemblybracketfromthechassis.
Figure45.RemovingthefrontaudioandUSBassembly
6.RemovethetwoscrewsthatsecurethefrontaudioandUSBassemblytoitsbracket.Thenremovethe
failingfrontaudioandUSBassemblyfromthebracket.
7.InstallanewfrontaudioandUSBassemblyintothebracketandinstallthetwoscrewstosecurethe
frontaudioandUSBassemblytothebracket.
8.InstallthefrontaudioandUSBassemblybrackettothechassisandalignthescrewholeinthebracket
withthecorrespondingholeinthechassis.
9.InstallthescrewtosecurethefrontaudioandUSBassemblybrackettothechassis.
10.ReconnectthefrontUSBandfrontaudiocablestothesystemboard.See“Locatingpartsonthe
systemboard”onpage10.
11.Reinstallthefrontbezel.See“Removingandreinstallingthefrontbezel”onpage15.
Whattodonext:
•Toworkwithanotherpieceofhardware,gototheappropriatesection.
•Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage52.
50ThinkCentreUserGuide