Lenovo 3980 User Manual Page 39

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Chapter4.Generalcheckout
Attention
Thedrivesinthecomputeryouareservicingmighthavebeenrearrangedorthedrivestartupsequencemight
hasbeenchanged.Beextremelycarefulduringwriteoperationssuchascopying,saving,orformatting.
Dataorprogramscanbeoverwrittenifyouselectanincorrectdrive.
Generalerrormessagesappearifaproblemorconictisfoundbyanapplicationprogram,theoperating
system,orboth.Fortheexplanationofthesemessages,refertotheinformationsuppliedwiththatsoftware
package.
BeforereplacinganyaFRU,makesurethatthelatestlevelofBasicInputOutputSystem(BIOS)isinstalled
onyourcomputer.Adown-levelBIOSmightcausefalseerrorsandunnecessaryreplacementofthesystem
board.FormoreinformationonhowtodetermineandobtainthelatestlevelBIOS,see“BIOSlevels”
onpage99
.
Usethefollowingproceduretohelpyoudeterminethecauseofaproblem:
1.Turnoffallattachedexternaldevicesandthecomputer.
2.Checkallcablesandpowercords.
3.Setalldisplaycontrolstothemiddleposition.
4.Turnonallattachedexternaldevicesandthecomputer.
Lookforthedisplayederrorcodes
Listenforthebeepcodes
Lookforreadableinstructionsoramainmenuonthedisplay.
Ifyoudonotreceivethecorrectresponse,proceedtostep5onpage33
.
Ifyoudoreceivethecorrectresponse,runthediagnostics.See“Runningthediagnosticprogram
fromadiagnosticdisc”onpage38.
5.Checkthefollowingconditionsandfollowtheinstructions:
Ifyouhearbeepcodesduringpower-onself-test(POST),goto“Beepsymptoms”onpage61
.
IfthecomputerdisplaysaPOSTerror,goto“POSTerrorcodes”onpage61.
Ifthecomputerhangsandnoerrorisdisplayed,goto“Powerproblems”onpage33.
Checkingforpowerproblems
Ifthecomputerdoesnotturnonwhenthepowerswitchispressed,usethefollowingproceduretohelp
yousolvetheproblem:
1.Pressthepowerswitchtoturnonthecomputer.Checkthepowerindicatorlight-emittingdiode(LED)
nexttothepowerswitch.
IftheLEDisilluminated(on),thecomputerpowerisOK.Attempttorunthediagnostics.See
“Runningthediagnosticprogramfromadiagnosticdisc”onpage38
.
IftheLEDisnotilluminated(off),gotostep.
2.CheckthestatusofthepowerindicatorLEDontheac/dcpoweradapter.
IftheLEDisilluminated(on),gotostep.
IftheLEDisnotilluminated(off),gotothenextstep.
3.Verifythatthepowercordiscorrectlyconnectedtoanacpoweroutlet.
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