Lenovo ThinkPad E455 - Resetting Your Computer to the Factory Default Settings; Recovering Your Operating System if Windows 8.1 Fails to Start

Problemswiththedisplayandmultimediadevices
Thistopicincludesthemostcommonproblemswithdisplaysandmultimediadevices,includingthe
computerdisplay,theexternalmonitor,andaudiodevices.
Computerscreenproblems
•Problem:MyscreenkeepsblankingwhenIdonotwantitto.
Solution:IfyourcomputerispreinstalledwiththeWindows7operatingsystem,youcandisableany
systemtimers,suchastheLCDturn-offtimerortheblanktimerbydoingthefollowing:
1.StartPowerManager.
2.ClickthePowerplantab,andthenselectMaximumPerformancefromthepredefinedpowerplans.
IfyourcomputerispreinstalledwiththeWindows8.1orWindows10operatingsystem,dothefollowing:
1.GotoControlPanel,andensurethatyouviewControlPanelbyCategory.
2.ClickHardwareandSound➙PowerOptions➙Highperformance.
3.Showtheadditionalplans,thenchooseHighperformance.
•Problem:WhenIturnonthecomputer,nothingisdisplayedonthescreenandthecomputerdoesnot
beepwhilestartingup.
Note:Ifyouarenotsurewhetheryouheardanybeeps,turnoffthecomputerbypressingandholdingthe
powerbuttonforfoursecondsormore.Thenturnonthecomputerandlistenagain.
Solution:Makesurethat:
–Theacpoweradapterisconnectedtothecomputerandthepowercordispluggedintoaworking
electricaloutlet.
–Thecomputeristurnedon.(Pressthepowerbuttonagainforconfirmation.)
–Thebrightnesslevelofthescreenisappropriatelyset.
Ifapower-onpasswordisset,pressanykeytodisplaythepromptforthepower-onpasswordand
thentypethecorrectpasswordandpressEnter.
Iftheseitemsarecorrectlyset,andthescreenremainsblank,havethecomputerserviced.
•Problem:WhenIturnonthecomputer,onlyawhitecursorisdisplayedonablankscreen.
Solution:Ifyouhavemodifiedapartitiononyourstoragedrivebyusingpartitionsoftware,information
aboutthatpartition,orthemasterbootrecordmighthavebeendestroyed.
Dothefollowingtotrytosolvetheproblem:
1.Turnoffthecomputer,andthenturnitonagain.
2.Ifyoustillseeonlythecursoronthescreen,dothefollowing:
–Ifyouhaveusedpartitionsoftware,examinethepartitiononthestoragedrivebyusingthe
software,andrecoverthepartitionifrequired.
–Usetherecoverysolutionstorestorethesystemtothefactorydefaultstate.
Iftheproblempersists,havethecomputerserviced.
•Problem:Myscreengoesblankwhilethecomputerison.
Solution:Yourscreensaverorpowermanagementmighthavebeenenabled.Dooneofthefollowing:
–TouchtheTrackPointpointingdeviceorthetouchpad,orpressakeytoexitthescreensaver.
–Pressthepowerbuttontoresumethecomputerfromsleeporhibernationmode.
•Problem:Thescreenisblank.
Solution:Dothefollowing:
Chapter8.Troubleshootingcomputerproblems87