Lenovo ThinkCentre E73z - Audio Problems

Toerasealostorforgottenpassword,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandthecomputer.Then,disconnect
allpowercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtothecomputer.
2.Placeasoft,cleantowelorclothonthedeskorsurface.Holdthesidesofyourcomputerandgentlylay
itdownsothatthescreenisagainstthesurfaceandthecoverisfacingup.
3.Removethecomputerstand.See“Removingandinstallingthecomputerstand”onpage71.
4.Removethecomputercover.See“Removingthecomputercover”onpage75.
5.Removethesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage83.
6.LocatetheClearComplementaryMetalOxideSemiconductor(CMOS)/Recoveryjumperonthesystem
board.See“Locatingpartsonthesystemboard”onpage69.
7.Movethejumperfromthestandardposition(pin1andpin2)tothemaintenanceposition(pin2and
pin3).
8.Installthesystemboardshield.See“Removingandreinstallingthesystemboardshield”onpage83.
9.Installthecomputercover.See“Completingthepartsreplacement”onpage108.
10.Installthecomputerstand.See“Removingandinstallingthecomputerstand”onpage71.
11.Connecttheexternalcablesandthepowercordtothecomputer.
12.Turnonthecomputerandleaveitonforapproximately10seconds.Then,turnoffthecomputerby
holdingthepowerswitchforapproximatelyveseconds.
13.Repeatstep1throughstep6.
14.MovetheClearCMOS/Recoveryjumperbacktothestandardposition(pin1andpin2).
15.Repeatstep8throughstep11.
16.Turnonthecomputertorestarttheoperatingsystem.
Enablingordisablingadevice
Thissectionprovidesinformationonhowtoenableordisableuseraccesstothefollowingdevices:
USBSetupUsethisoptiontoenableordisableaUSBconnector.WhenaUSBconnectoris
disabled,thedeviceconnectedtotheUSBconnectorcannotbeused.
SATAControllerWhenthisfeatureissettoDisable,alldevicesconnectedtotheSATAconnectors
(suchasharddiskdrivesortheopticaldrive)aredisabledandcannotbeaccessed.
Toenableordisableadevice,dothefollowing:
1.StarttheSetupUtilityprogram.See“StartingtheSetupUtilityprogram”onpage55.
2.FromtheSetupUtilityprogrammainmenu,selectDevices.
3.Dependingonthedeviceyouwanttoenableordisable,dooneofthefollowing:
•SelectUSBSetuptoenableordisableaUSBdevice.
•SelectATADriveSetuptoenableordisableaSATAdevice.
4.SelectthedesiredsettingsandpressEnter.
5.PressF10tosavechangesandexittheSetupUtilityprogram.See“ExitingtheSetupUtilityprogram”
onpage58.
Selectingastartupdevice
Ifyourcomputerdoesnotstartupfromadevicesuchasthediscorharddiskdriveasexpected,dooneof
thefollowingtoselectthestartupdeviceyouwant.
Chapter6.UsingtheSetupUtilityprogram57