5.RemovethecomputerfromaThinkPadportreplicatorordockingstation.Referto“Detachinga
ThinkPadportreplicatorordockingstation”onpage109.
6.Removealldevicesandthentestforsystempowerwithminimaldevicesattached.
a.Disconnecttheacpoweradapterandallcablesfromthecomputer.
b.Closethecomputerdisplay,andturnthecomputerover.
c.Removethebattery,memorymodule,PCIExpressMiniCards,Ultrabaydevice,harddiskdriveor
solidstatedriveormSATAsolidstatedrive.SeeChapter6“Replacingdevices”onpage69
.
d.Waitfor30seconds,andthenreinstallthememorymoduleandtheknowngoodbatteryortheac
poweradaptertotestthecomputerwithminimaldevicesattachedrst.
e.Reinstalleachdeviceoneatatimethatyouhaveremovedintheearliersteps.
Ifyourcomputerdoesnotrunonbatterypower,checkthefollowingitems:
1.Removeandreseatthebatterytomakesurethatitisproperlyconnected.Referto“Replacingthe
battery”onpage69.
2.Swapbatterieswithanothersimilarmodel,ifavailable.
IfanothersimilarThinkPadmodelisavailable,thenverifythatthebatterypackworksintheother
computerandthatthebatterypackfortheothermodelworksinthiscomputer.
3.Verifythebattery-statusindicator.Referto“Powerstatusindicators”onpage8.
Thebattery-statusindicatorisnormallyilluminatedwheneverthebatteryisinstalledandthecomputeris
on,ortheacpoweradapterisconnectedandthebatteryischarging.Thisindicatormightbeblinkingor
solidineitherorangeorgreencolordependingonthestatusofthebattery.
Apowerbuttonproblem
Problem:Thesystemdoesnotrespond,andyoucannotturnoffthecomputer.
Solution:Turnoffthecomputerbypressingandholdingthepowerbuttonfor4secondsormore.Ifthe
systemisstillnotreset,removetheacpoweradapterandthebattery.
Startupproblems
Printtheseinstructionsnowandkeepthemwithyourcomputerforreferencelater.
Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,checkthefollowingitem:
•Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,followtheappropriatecorrective
actionsforpower-onself-test(POST)errormessages.See“Errormessages”onpage138
Ifyoureceiveanerrormessagewhiletheoperatingsystemisloadingthedesktopcongurationafterthe
POSTiscompleted,checkthefollowingitems:
1.GototheLenovoSupportWebsiteat:http://www.lenovo.com/supportandsearchfortheerror
message.
2.VisittheMicrosoftKnowledgeBasehomepageat:http://support.microsoft.com/andsearchforthe
errormessage.
Sleepandhibernationproblems
•Problem:Thecomputerenterssleepmodeunexpectedly.
Solution:Ifthemicroprocessoroverheats,thecomputerautomaticallyenterssleepmodetoallowthe
computertocoolandtoprotectthemicroprocessorandotherinternalcomponents.Checkthesettings
forsleepmode,usingPowerManager.
Chapter10.Troubleshootingcomputerproblems151