Lenovo ThinkPad T540p User Manual Page 150

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Message:2200:MachineTypeandSerialNumberareinvalid.
Solution:MachineTypeandSerialNumberareinvalid.Havethecomputerserviced.
Message:2201:MachineUUIDisinvalid.
Solution:MachineUUIDisinvalid.Havethecomputerserviced.
Message:Fanerror
Solution:Coolingfanhasfailed.Turnoffthecomputerimmediatelyandhavethecomputerserviced.
Message:Thermalsensingerror
Solution:Thethermalsensorisnotfunctioningcorrectly.Turnoffthecomputerimmediatelyandhave
thecomputerserviced.
Errorswithoutmessages
Problem:MyscreenkeepsblankingwhenIdonotwantitto.
Solution:IfyoucomputerispreinstalledwiththeWindows7operatingsystem,youcandisableany
systemtimers,suchastheLCDturn-offtimerortheblanktimerbydoingthefollowing:
1.StartPowerManager.
2.ClickthePowerplantab,andthenselectMaximumPerformancefromthepredefinedpowerplans.
Problem:WhenIturnonthecomputer,nothingisdisplayedonthescreenandthecomputerdoesnot
beepwhilestartingup.
Note:Ifyouarenotsurewhetheryouheardanybeeps,turnoffthecomputerbypressingandholdingthe
powerbuttonforfoursecondsormore.Thenturnonthecomputerandlistenagain.
Solution:Makesurethat:
Thebatteryisinstalledcorrectly.
Theacpoweradapterisconnectedtothecomputerandthepowercordispluggedintoaworking
electricaloutlet.
Thecomputeristurnedon.(Pressthepowerbuttonagainforconfirmation.)
Thebrightnesslevelofthescreenisappropriatelyset.
Ifapower-onpasswordisset,pressanykeytodisplaythepromptforthepower-onpasswordand
thentypethecorrectpasswordandpressEnter.
Iftheseitemsarecorrectlyset,andthescreenremainsblank,havethecomputerserviced.
Problem:WhenIturnonthecomputer,onlyawhitecursorisdisplayedonablankscreen.
Solution:Ifyouhavemodifiedapartitiononyourharddiskdrivebyusingpartitionsoftware,information
aboutthatpartition,orthemasterbootrecordmighthavebeendestroyed.
1.Turnoffthecomputer,andthenturnitonagain.
2.Ifyoustillseeonlythecursoronthescreen,dothefollowing:
Ifyouhaveusedthepartitionsoftware,examinethepartitionontheharddiskdrivebyusingthe
software,andrecoverthepartitionifrequired.
Usetherecoverysolutionstorestorethesystemtothefactorydefaultstate.
Iftheproblempersists,havethecomputerserviced.
Problem:Myscreengoesblankwhilethecomputerison.
134UserGuide
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