
2.Checkallpowerconnections.Removeanypowerstripsandsurgeprotectorstoconnecttheacpower
adapterdirectlytotheacpoweroutlet.
3.Inspecttheacpoweradapter.Checkforanyphysicaldamage,andmakesurethatthepowercableis
rmlyattachedtotheadapterbrickandthecomputer.
4.Verifytheacpowersourceisworkingbyattachinganotherdevicetotheoutlet.
5.Removealldevicesandthentestforsystempowerwithminimaldevicesattached.
a.Disconnecttheacpoweradapterandallcablesfromthecomputer.
b.Closethecomputerdisplay,andturnthecomputerover.
c.Removethememorymodule.Referto“Replacingamemorymodule”onpage80.
d.RemovethePCIExpressMiniCard.Referto“InstallingandreplacingthePCIExpressMiniCardfor
wirelessLAN/WiMAXconnection”onpage87.
e.Removetheharddiskdrive.Referto“Replacingthesolidstatedriveorharddiskdrive”onpage77.
f.Waitfor30seconds,andthenreinstalltheSO-DIMMandtheacpoweradaptertotestthecomputer
withminimaldevicesattachedrst.
g.Reinstalleachdeviceoneatatimethatyouhaveremovedintheearliersteps.
Ifyourcomputerdoesnotrunonbatterypower,checkthefollowing:
Verifythebattery-statusindicator.Referto“Powerstatusindicator”onpage10.
Thebattery-statusindicatorisnormallyilluminatedwheneverthecomputerison,ortheacpoweradapteris
connectedandthebatteryischarging.Thisindicatormaybeblinkingorsolidineitherorangeorgreencolor
dependingonthestatusofthebattery.
Apowerbuttonproblem
•Problem:Thesystemdoesnotrespond,andyoucannotturnoffthecomputer.
Solution:Turnoffthecomputerbypressingandholdingthepowerbuttonfor4secondsormore.Ifthe
computerstilldoesnotrespond,removetheacpoweradapterandresetthecomputerbyinsertinga
straightenedpaperclipintotheemergencyresetholetoturnoffthecomputer.
Startupproblems
Printtheseinstructionsnowandkeepthemwithyourcomputerforreferencelater.
Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,checkthefollowingitem:
•FollowtheappropriatecorrectiveactionsforPower-onself-testerrormessages.
Ifyoureceiveanerrormessagewhiletheoperatingsystemisloadingthedesktopcongurationafterthe
POSTiscompleted,checkthefollowingitems:
1.VisittheLenovoSupportWebsiteathttp://www.lenovo.com/supportandsearchfortheerrormessage.
2.VisittheMicrosoftKnowledgeBasehomepageathttp://support.microsoft.com/andsearchforthe
errormessage.
Sleep(standby)andhibernationproblems
•Problem:Thecomputerenterssleep(standby)modeunexpectedly.
Solution:Iftheprocessoroverheats,thecomputerautomaticallyentersleep(standby)modetoallow
thecomputertocoolandtoprotecttheprocessorandotherinternalcomponents.Checkthesettings
forsleep(standby)mode,usingPowerManager.
Chapter10.Troubleshootingcomputerproblems151
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