Ifthekeyboardproblemisresolved,carefullyreconnecttheexternalnumerickeypad,externalkeyboard,
makingsurethatyouhaveseatedtheconnectorsproperly.
Iftheproblemremains,makesurethatthecorrectdevicedriverisinstalled.
ForWindows7:
1.ClickStart➙ControlPanel.ChangetheviewoftheControlPanelfromCategorytoLargeicons
orSmallicons.
2.ClickK eyboard.
3.SelecttheHardwaretab.IntheDeviceProperties,makesurethattheDeviceStatusisThisdevice
isworkingproperly.
ForWindowsVista:
1.ClickStart➙ControlPanel.
2.ClickHardwareandSound,andthenclickKeyboard.
3.SelecttheHardwaretab.IntheDeviceProperties,makesurethattheDeviceStatusisThisdevice
isworkingproperly.
ForWindowsXP:
1.ClickStart➙ControlPanel.
2.ClickPrintersandOtherHar dware,andthenclickKeyboard.
3.SelecttheHardwaretab.IntheIntheDeviceProperties,makesurethattheDeviceS tatusisThis
deviceisworkingproperly.
Ifkeysonthekeyboardstilldonotwork,havethecomput erserviced.
•Problem:Anumberappearswhenyoutypealetter.
Solution:Thenumericlockfunctionison.Todisableit,pressShift+ScrLkorFn+NmLk.
•Problem:Allorsomekeysontheexternalnumerickeypaddonotwork.
Solution:Makesurethattheexternalnumerickeypadiscorrectlyconnectedtothecomputer.
Displayandmultimediadevices
Thissectionincludesthemostcommondisplayandmultimediadevicesproblemswhicharecomputer
screen,externalmonitor,audio,andopticaldrive.Checkthesetopicstolearnmoreinformation.

Computerscreenproblems

•Problem:Thescreenisblank.
Solution:Dothefollowing:
–PressFn+F7tobringuptheimage.
Note:IfyouusetheFn+F7k eycombinationtoapplyapresentationscheme,pressFn+F7atleast
threetimesinthreeseconds,andtheimageisdisplayedonthecomputerscreen.
–Ifyouareusingtheacpoweradapter,orusingthebatteryandthebatterystatusindicat orison(is
green),pr essFn+Hometomakethescreenbrighter.
–Ifthesleep(standby)statusindicatorison(isgreen),pressFntoresumefromthesleep(standby)mode.
–Iftheproblempersists,dotheSolutionintheproblembelow.
Note:IfyourcomputerisaWindows7model,itdoesnotsupportthepresentationscheme.
•Problem:Thescreenisunreadableordistorted.
Chapter10.Troubleshootingcomputerproblems215