BeepSymptomFRU/Action
1longand9shortbeepsBIOSROMerror
Performthefollowingactionsinorder.
1.StarttheSetupUtilityprogramandpressF9toload
defaultsandthenpressF10toSaveandexit.See
Chapter6“UsingtheSetupUtility”onpage43
.
2.PerformaBoot-blockrecovery.See“Recovering
fromaPOST/BIOSupdatefailure”onpage560.
3.Replacethesystemboard.
FoursetsofthreebeepsDRAMmemoryerror
Performthefollowingactionsinorder.
1.Makesurethememorymodule(s)areproperlyseated
intheconnector(s).
2.Replacethememorymodule(s).
3.Replacethesystemboard.
POSTerrorcodes
Eachtimeyoupower-onthesystem,itperformsaseriesofteststhatchecktheoperationofthesystem
andsomeoptions.ThisseriesoftestsiscalledthePower-OnSelf-Test,orPOST.POSTdoesthefollowing
operations.
•Checkssomebasicsystem-boardoperations
•Checksthememoryoperation
•Startsthevideooperation
•Veriesthatthebootdriveisworking
IfthePOSTdetectsaproblem,anerrormessageappearsonthescreen.Asingleproblemcancauseseveral
errormessagestoappear.Whenyoucorrectthecauseofthersterrormessage,theothererrormessages
probablywillnotappearonthescreenthenexttimeyouturnonthesystem.
POSTErrorMessageDescription/Action
CMOSbatteryfailedTheCMOSbatteryisnolongerfunctional.
Replacethebattery.
CMOSchecksumerror-defaultsloadedChecksumofCMOSisincorrect.
Thecomputerloadsthedefaultcongurationsettings.
ThiserrormightindicatethatCMOShasbecomecorrupt
duetoaweakCMOSbattery.
CPUatnnnn
nnnnistherunningspeedofthemicroprocessor.
PressEsctoskipmemorytest
PressingEscskipsthefullmemorytest
HARDDISKINSTALLFAILURECannotndorinitializetheharddiskdrivecontrolleror
thedrive.
Makesuretheharddiskdriveiscorrectlyinstalled.
Ifnoharddiskdrivesareinstalled,makesurethehard
diskdriveselectioninSetupissettoNONE.
66ThinkCentreHardwareMaintenanceManual
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