Lenovo E420s Betriebsanweisung PDF herunterladen (Seite 163)

Solution:Turnoffthecomputerbypressingandholdingthepowerbuttonfor4secondsormore.Ifthe

computerstilldoesnotrespond,removetheacpoweradapterandresetthecomputerbyinsertinga

straightenedpaperclipintotheemergencyresetholetoturnoffthecomputer.

Startupproblems

Printtheseinstructionsnowandkeepthemwithyourcomputerforreferencelater.

Ifyoureceiveanerrormessagebeforetheoperatingsystemloads,checkthefollowingitem:

•FollowtheappropriatecorrectiveactionsforPower-onself-testerrormessages.

Ifyoureceiveanerrormessagewhiletheoperatingsystemisloadingthedesktopcongurationafterthe

POSTiscompleted,checkthefollowingitems:

1.VisittheLenovoSupportWebsiteathttp://www.lenovo.com/think/supportandsearchfortheerror

message.

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”onpage14,

“Specications”onpage15,and“Operatingenvironment”onpage15.

Ifthebatteryischargedandthetemperatureiswithinrange,havethecomputerserviced.

•Problem:The“criticallow-batteryerror”messageappears,andthecomputerimmediatelyturnsoff.

Solution:Thebatterypowerisgettinglow.Connecttheacpoweradaptertothecomputerandplugit

intoanelectricaloutlet.

•Problem:ThecomputerdisplayremainsblankafteryoupressFntoreturnfromsleep(standby)mode.

Solution:Checkwhetheranexternalmonitorwasdisconnectedorturnedoffwhilethecomputerwas

insleep(standby)mode.Ifyoudisconnectedorturnedofftheexternalmonitor,connectitorturniton

beforeresumingthecomputerfromthesleep(standby)mode.Whenresumingthecomputerfromthe

sleep(standby)modewithoutattachingtheexternalmonitororturningiton,andthecomputerdisplay

remainsblank,pressF6tobringupthecomputerdisplay.

Note:IfyouareusingF6toapplyapresentationscheme,youwillneedtopressF6atleastthreetimesin

threesecondstobringupthecomputerdisplay.

Note:IfyourcomputerisaWindows7model,itdoesnotsupportthepresentationscheme.

•Problem:Thecomputerdoesnotreturnfromsleep(standby)mode,orthesleep(standby)indicatorstays

onandthecomputerdoesnotwork.

Solution:Ifthesystemdoesnotreturnfromsleep(standby)mode,itmayhaveenteredsleep(standby)or

hibernationmodeautomaticallybecausethebatteryisdepleted.Checkthesleep(standby)indicator.

Chapter10.Troubleshootingcomputerproblems145

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Lenovo E420s Betriebsanweisung Seite 163