User Guide

Chapter 4. Troubleshooting
25
Sleep problems
The critical low-battery
error message appears,
and the computer
immediately turns off.
• Th
ebatterypowerisgettinglow.ConnecttheACpower
adaptertothecomputer.
The computer enters sleep
mo
de immediately after
Power-on self-test (POST).
• Makesurethat:
‐ Theba
tterypackischarged.
‐ Theoper
ating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packischargedandthetemperatureiswithinrange,havethecomputerserviced.
The computer does not
return from sleep mode,
and the computer does
not work.
• Ifyourcomputerisinsleepmode,connecttheACpoweradapter
tothecomputer ,thenpressanykeyorthePowerbutton.
• Ifthesystemstilldoesnotreturnfromsleepmode,stops
responding,orcannotbeturnedoff,resetthecomputer.
Unsaveddatamaybelost.Toresetthecomputer,pressand
holdthePowerbuttonforfoursecondsormore.Ifthe
computerisstillnotreset,removetheACpowerad
apter.
Display panel problems
The screen is blank. • Dothefollowing:
‐ Ifyo
uareusingtheACpoweradapterorthebatterypack,
andthebatterystatusindicatorison,pressF12(
)to
maketh
escreenbrighter.
‐ Ifth
epowerindicatorisblinking,pressthePowerbuttonto
resumefromsleepmode.
‐ Ifth
eproblempersists,followthesolutioninthenext
problem“Thescreenisunreadableordistorted.”
The screen is unreadable
or
distorted.
• Makesurethat:
‐ Thedis
playdevicedriverisinstalledcorrectly.
‐ Thescreenre
solutionandcolorqualityarecorrectlyset.
‐ Themo
nitortypeiscorrect.
Incorrect characters
appe
ar on the screen.
• Istheoperatingsystemorprogramsinstalledcorrectly?If
theyareinstalledandconfiguredcorrectly,havethe
computerserviced.