ThinkPad T420s - Page 46

Table1.FRUtests
FRUApplicabletest
Systemboard1.Diagnostics➙CPU/Coprocessor.
2.Diagnostics➙Systemboard.
3.IfthedockingstationortheportreplicatorisattachedtotheThinkPadNotebook,
detachit.
Power
Diagnostics➙ThinkPadDevices➙ACAdapter,Battery1(Battery2).
LCDunit
1.Diagnostics➙VideoAdapter.
2.InteractiveTests➙Video.
Audio
EntertheThinkPadSetupandchangeSerialATA(SATA)settingtoCompatibility,and
runDiagnostics➙OtherDevice➙ConexantAudio.
SpeakerInteractiveT ests➙InternalSpeaker.
Note:OnceAudiotestisdone,thenosoundisheardthistest.Inthiscase,turnoff
andturnonthecomputer.Then,runthistestagain.
Keyboard
1.Diagnostics➙Systemboard.
2.InteractiveTests➙Keyboard.
Harddiskdriveorsolid-state
drive
EntertheThinkPadSetupandchangeSerialATA(SATA)settingtoCompatibility,and
runDiagnostics➙FixedDisks.
Diskettedrive1.Diagnostics➙DisketteDrives.
2.InteractiveTests➙Diskette.
Opticaldrive1.Diagnostics➙OtherDevices➙OpticalDrive.
2.InteractiveTests➙OpticalDriveT est.
Memory
1.IftwoDIMMsareinstalled,removeoneofthemandrunDiagnostics➙System
Memory.
2.Iftheproblemdoesnotrecur,returntheDIMMtoitsplace,removetheotherone,
andrunthetestagain.
TrackPointorpointing
device
IftheTrackPointdoesnotwork,checktheconfigurationasspecifiedintheThinkPad
Setup.IftheTrackpointisdisabled,selectAutomatictoenableit.
AfteryouusetheTrackPoint,thepointermaydriftonthescreenforashorttime.This
driftcanoccurwhenaslight,steadypressureisappliedtotheTrackPointpointer.
Thissymptomisnotahardwareproblem.Ifthepointerstopsafterashorttime,no
serviceactionisnecessary.
IfenablingtheTrackPointdoesnotcorrecttheproblem,continuewiththefollowing:
•InteractiveT ests➙Mouse.
TouchPad
IftheTouchPaddoesnotwork,checktheconfigurationasspecifiedintheThinkPad
Setup.IftheTouchPadisdisabled,selectAutomatictoenableit.Ifenablingthe
TouchPaddoesnotcorrecttheproblem,continuewiththefollowing:
•InteractiveT ests➙Mouse.
SystemsupportingtheLenovodiagnosticsprograms
ThesectionprovidesinformationaboutThinkPadcomputersthatsupporttheLenovodiagnosticsprograms.
Somedescriptionsmightnotapplytoyourparticularcomputer.
TheLenovodiagnosticsprogramsincludefollowing:
•LenovoSolutionCenter
•Quicktestprograms
•UEFIdiagnosticprogram
•Bootablediagnosticprograms
40HardwareMaintenanceManual