Apowerbuttonproblem
•Problem:Thesystemdoesnotrespond,andyoucannotturnoffthecomputer.
Solution:Turnoffthecomputerbypressingandholdingthepowerbuttonfor4secondsormore.Ifthe
systemisstillnotreset,removetheacpoweradapterandthebattery.
Startupproblems
Printtheseinstructionsnowandkeepthemwithyourcomputerforreferencelater.
Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,checkthefollowingitem:
•FollowtheappropriatecorrectiveactionsforP ower-onself-testerrormessages.
Ifyoureceiveanerrormessagewhiletheoperatingsystemisloadingthedesktopcongurationafterthe
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.
•Problem:Thecomputerenterssleep(standby)mode(thesleep/standbyindicatorturnson)immediately
afterPower-onself-test.
Solution:Makesurethat:
–Thebatteryischarged.
–Theoperatingtemperatureiswithintheacceptablerange.Referto“Features”onpage27,
“Specications”onpage30,and“Operatingenvironment”onpage32.
Ifthebatteryischargedandthetemperatureiswithinrange,havethecomputerserviced.
•Problem:The“criticallow-batteryerror”messageappears,andthecomputerimmediatelyturnsoff.
Solution:Thebatterypowerisgettinglow.Connecttheacpoweradaptertothecomputerandplugit
intoanelectricaloutlet,orreplacethebatterywithachargedone.
•Problem:ThecomputerdisplayremainsblankafteryoupressFntoreturnfromsleep(standby)mode.
Solution:Checkwhetheranext ernalmonitorwasdisconnect edorturnedoffwhilethecomputerwas
insleep(standby)mode.Ifyoudisconnectedorturnedofftheexternalmonitor,connectitorturniton
beforeresumingthecomputerfromthesleep(standby)mode.Whenresumingthecomputerfromthe
sleep(standby)modewithoutattachingtheexternalmonitororturningiton,andthecomputerdisplay
remainsblank,pressFn+F7tobringupthecomputerdisplay.
Note:IfyouareusingFn+F7toapplyapresentationscheme,youwillneedtopressFn+F7atleastthree
timesinthreesecondstobringupthecomputerdisplay.
Note:IfyourcomputerisaWindows7model,itdoesnotsupportthepresentationscheme.
•Problem:Thecomputerdoesnotreturnfromsleep(standby)mode,orthesleep(standby)indicatorstays
onandthecomputerdoesnotwork.
Chapter10.Troubleshootingcomputerproblems231