f.Removetheharddiskdrive.Referto“Replacingtheharddiskdrive”onpage67.
g.Waitfor30seconds,andthenreinstallthememorymoduleandtheknowngoodbatteryortheac
poweradaptertotestthecomputerwithminimaldevicesattachedrst.
h.Reinstalleachdeviceoneatatimethatyouhaveremovedintheearliersteps.
Ifyourcomputerdoesnotrunonbatterypower,checkthefollowingitems:
1.Removeandreseatthebatterytomakesurethatitisproperlyconnected.Referto“Replacingthe
battery”onpage65.
2.Swapbatterieswithanothersimilarmodel,ifavailable.
IfanothersimilarThinkPadmodelisavailable,thenverifythatthebatterypackworksintheother
computerandthatthebatterypackfortheothermodelworksinthiscomputer.
3.Verifythebattery-statusindicator.Referto“Powerstatusindicator”onpage10.
Apowerbuttonproblem
Problem:Thesystemdoesnotrespond,andyoucannotturnoffthecomputer.
Solution:Turnoffthecomputerbypressingandholdingthepowerbuttonfor4secondsormore.Ifthe
systemisstillnotreset,removetheacpoweradapterandthebattery.
Bootproblems
Printtheseinstructionsnowandkeepthemwithyourcomputerforreferencelater.
Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,followtheappropriatecorrectiveactions
forPOSTerrormessages.
Ifyoureceiveanerrormessagewhiletheoperatingsystemisloadingthedesktopcongurationafterthe
POSTiscompleted,checkthefollowingitems:
1.GototheLenovoSupportWebsiteathttp://www.lenovo.com/supportandsearchfortheerrormessage.
2.GototheMicrosoftKnowledgeBasehomepageathttp://support.microsoft.com/andsearchforthe
errormessage.
Sleepandhibernationproblems
•Problem:Thecomputerenterssleepmodeunexpectedly.
Solution:Ifthemicroprocessoroverheats,thecomputerautomaticallyenterssleepmodetoallowthe
computertocoolandtoprotectthemicroprocessorandotherinternalcomponents.Checkthesettings
forsleepmode.
•Problem:Thecomputerenterssleepmode(thesleepindicatorturnson)immediatelyafterthepower-on
self-test.
Solution:Makesurethat:
–Thebatteryischarged.
–Theoperatingtemperatureiswithintheacceptablerange.Referto“Operatingenvironment”onpage
15
.
Ifthebatteryischargedandthetemperatureiswithinrange,havethecomputerserviced.
•Problem:Acriticallow-batteryerroroccurs,andthecomputerimmediatelyturnsoff.
Solution:Thebatterypowerisgettinglow.Connecttheacpoweradaptertothecomputerandplugit
intoanelectricaloutlet,orreplacethebatterywithachargedone.
Chapter9.Troubleshootingcomputerproblems127
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