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Lenovo THINKPAD L520 - Audio Problems

Lenovo THINKPAD L520
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UsingtheLenovoSupportWebsite
IfyourcomputerhasneithertheLenovoSolutionCenterprogramnortheLenovoThinkVantageToolbox
programinstalled,gotohttp://www.lenovo.com/diagnoseforthelatestinformationondiagnosticsforyour
computer.
Note:Runninganytestmighttakeuptoseveralminutesorlonger.Makesurethatyouhavetimetorunthe
entiretest.Donotinterruptthetestwhileitisrunning.
Troubleshooting
Ifyourcomputerhasanerror,ittypicallydisplaysamessageoranerrorcode,orabeepsoundswhenyou
turniton.Tocorrectanerror,rstndthedescriptionoftheerrorintheleft-handcolumnofthechartthat
applies.Thenclickthatdescriptiontogetatroubleshootingprocedure.
Tomakesurethatyourcomputerhasthefeaturesoroptionsthatareintroducedinthefollowingsections,
consulttheonlinehelporthelistshippedwithyourcomputer.
Computerstopsresponding
Printtheseinstructionsnowandkeepitwithyourcomputerforreferencelater.
Ifyourcomputeriscompletelyunresponsive(youcannotusetheUltraNavpointingdeviceorthekeyboard),
dothefollowingsteps:
1.Pushandholdthepowerswitchuntilthemachineturnsoff.Afterthecomputeristurnedoff,restartby
pressingthepowerswitch.Ifthemachinedoesnotturnon,continuetostep2.
Note:Donotremovethebatteryandacpowertoresetthecomputer.
2.Whilethemachineisturnedoff,removeallpowersourcesfromthecomputer(batteryandacpower).
Holddownthepowerbuttonfor10seconds.Plugintheacpowerwhilekeepingthebatteryoutofthe
computer.Ifthecomputerdoesnotturnbackon,continuetostep3.
Note:OncethecomputerstartsupandentersWindows,usethepropershutdownproceduretoturn
thecomputeroff.Oncethemachineisoff,reattachthebatteryandrestartthecomputer.Ifthe
computerdoesnotstartwiththebatteryreattached,removethebatteryandagainstartwithstep2.If
thecomputerstartswithacpowerbutdoesnotstartwhenthebatteryisattached,calltheCustomer
SupportCenterforsupport.
3.Whilethemachineisoff,removeallsourcesofpowerfromthemachine(batteryandacpower).Remove
allexternaldevicesthatareattachedtoyourcomputer(keyboard,mouse,printer,scanner,etc.).Repeat
step2.Ifstep2isunsuccessful,continuetostep4.
Note:Thefollowingstepsinvolveremovingstaticsensitivecomponentsfromyourcomputer.Please
makesurethatyouareproperlygroundedandremoveallsourcesofpowerattachedtothecomputer.
IfyouareuncomfortableorunsureaboutremovingcomponentspleasecalltheCustomerSupport
Centerforassistance.
4.Whilethecomputerisoff,removeallsourcesofpowerandexternalhardware.Refertotheprocedure
inReplacingmemoryonhowtoremoveandreseatthememorymodules.Removeanynon-original
memorymoduleaddedtoyourcomputer.Afterremovingtheextramemorymoduleandreseating
theoriginalmemorymodule,repeatstep2.Ifthecomputerstilldoesnotturnon,consulttheuser's
referenceguideforothercustomer-replaceablecomponentsthatareattachedtoyourcomputer
Ifthecomputerstilldoesnotstartup,calltheCustomerSupportCenterandaCustomerSupportSpecialist
willassistyou.
158UserGuide

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