ThinkPad T420 - System Supporting the Lenovo Diagnostics Programs

FRUtests
ThefollowingtableshowsthetestforeachFRU.
Table1.FRUtests
FRUApplicabletest
Systemboard1.Diagnostics➙CPU/Coprocessor
2.Diagnostics➙Systemboard
3.IfthedockingstationortheportreplicatorisattachedtotheThinkPadNotebook,
detachit.
4.Placethecomputeronahorizontalsurface,andrunDiagnostics➙ThinkPad
Devices➙HDDActiveProtectionTest.
Note:Donotapplyanyphysicalshocktothecomputerwhilethetestisrunning.
Power
Diagnostics➙ThinkPadDevices➙acpoweradapter,Battery1(Battery2)
LCDunit
1.Diagnostics➙VideoAdapter
2.InteractiveT ests➙Video
Audio
EntertheThinkPadSetupprogramandchangeSerialATA(SATA)settingto
Compatibility,andrunDiagnostics➙OtherDevice➙ConexantAudio.
SpeakerInteractiveT ests➙InternalSpeaker
Note:OnceAudiotestisdone,thenosoundisheardthistest.Inthiscase,turnoff
andturnonthecomputer.Then,runthistestagain.
Keyboard
1.Diagnostics➙Systemboard➙Keyboard
2.InteractiveT ests➙Keyboard
Harddiskdriveorsolidstate
drive
EntertheThinkPadSetupprogramandchangeSerialATA(SATA)settingto
Compatibility,andrunDiagnostics➙FixedDisks.
Diskettedrive1.Diagnostics➙DisketteDrives
2.InteractiveT ests➙Diskette
Opticaldrive1.Diagnostics➙OtherDevices➙OpticalDrive
2.InteractiveTests➙OpticalDriveTest
Memory
1.IftwoDIMMsareinstalled,removeoneofthemandrunDiagnostics➙System
Memory.
2.Iftheproblemdoesnotrecur,returntheDIMMtoitsplace,removetheotherone,
andrunthetestagain.
TrackPointorpointing
device
IftheTrackPointdoesnotwork,checkthecongurationasspeciedintheThinkPad
Setupprogram.IftheTrackPointisdisabled,selectAutomatictoenableit.
AfteryouusetheTrackPoint,thepointermaydriftonthescreenforashorttime.This
driftcanoccurwhenaslight,steadypressureisappliedtotheTrackPointpointer.
Thissymptomisnotahardwareproblem.Ifthepointerstopsafterashorttime,no
serviceactionisnecessary.
IfenablingtheTrackPointdoesnotcorrecttheproblem,continuewiththefollowing:
•InteractiveTests➙Mouse
TouchPad
IftheTouchPaddoesnotwork,checkthecongurationasspeciedintheThinkPad
Setupprogram.IftheTouchPadisdisabled,selectAutomatictoenableit.Ifenabling
theT ouchPaddoesnotcorrecttheproblem,continuewiththefollowing:
•InteractiveTests➙Mouse
SystemsupportingtheLenovodiagnosticsprograms
ThesectionprovidesinformationaboutThinkPadcomputersthatsupporttheLenovodiagnosticsprograms.
Somedescriptionsmightnotapplytoyourparticularcomputer.
Chapter3.Generalcheckout33
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