Operation Manual

Chapter 4. Troubleshooting
29
Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Display problems
When I turn on the
computer, nothing appears
on the screen.
• Ifthescreenisblank,makesurethat:
‐ TheACpow
eradapterisconnectedtothe
computer,andthepowercordispluggedintoa
workingelectricaloutlet.
‐ Thecomputerpowerison.PressthePowerbutton
againforconfirmation.
• Iftheseitemsaresetcorrectly,andthescreenremains
blank,havethecomputerserviced.
When I turn on the
computer, only a white
cursor appears on a blank
screen.
• Restorebacked‐upfilestoyourWindows
environmentortheentirecontentsofyourharddisk
toitsoriginalfactorycontentsusingtheLenovo
OneKeyRecoverysystem.Ifyoustillseeonlythe
cursoronthescreen,havethecomputerserviced.
The screen goes blank
wh
ile the computer is on.
• Yourpowermanagementisenabled.Dooneofthe
followingtoresumefromsleepmode:
‐ Pres
sanykeyonthekeyboard.
‐ Pres
sthePowerbutton.
‐ Pres
sF9( )toconfirmwhetherthebacklightof
theLCDscreenhasbeenturnedoff.
Sleep problems
The critical low-battery
error message appears,
and the computer
immediately turns off.
• Thebatterypowerisgettinglow.ConnecttheAC
poweradaptertothecomputer.
The computer enters sleep
mode immediately
after
Power-on.
• Makesurethat:
‐ Thebat
teryischarged.
‐ Theope
ratingtemperatureiswithintheacceptable
range.See“Chapter2.UseandcareInformation”in
theLenovoSafetyandGeneralInformationGuide.
Note: Ifthebatteryischargedandthetemperatureiswithinrange,havethecomputer
serviced.