Computer Hardware User Manual

6.RemovethescrewthatsecuresthefrontaudioandUSBassemblybrackettothechassistoremove
thebracketfromthechassis.
Figure45.RemovingthescrewthatsecuresthefrontaudioandUSBassemblytothechassis
7.RemovethetwoscrewsthatsecurethefrontaudioandUSBassemblytoitsbracketandremovethe
failingfrontaudioandUSBassemblyfromthebracket.
8.InstallanewfrontaudioandUSBassemblyintothebracketandinstallthetwoscrewstosecurethe
frontaudioandUSBassemblytothebracket.
9.InstallthefrontaudioandUSBassemblybracketintothechassisandalignthescrewholeinthe
bracketwiththecorrespondingholeinthechassis.
10.Installthescrewtosecurethebrackettothechassis.
11.ReconnectthefrontaudioandUSBassemblycablestothefrontaudioconnectorandthefrontUSB
connectoronthesystemboard.See“Locatingpartsonthesystemboard”onpage77.
12.Tocompletetheinstallationorreplacement,goto“Completingthepartsreplacement”onpage113.
Replacingtheinternalspeaker
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheThinkCentreUserGuide.ToobtainacopyoftheThinkCentreUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacetheinternalspeaker.
Note:Theinternalspeakerisonlyavailableonsomemodels.
Toreplacetheinternalspeaker,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Removethecomputercover.See“Removingthecomputercover”onpage79.
Chapter8.ReplacingFRUs(MachineTypes:4468,4473,4476,4479,4495,4497,4499,4504,4513,4517,4524,
7021,7032,7034,7049,7052,7053,7073,7136,and7178.)111