Lenovo 80SF0001US - Display Panel and Sound Troubleshooting

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the
WindowsbuttonorthePowerbutton.
• Ifthesystemstilldoesnotreturnfromsleepmode,
yoursystemhasstoppedresponding,andyoucannot
turnoffthecomputer;resetthecomputer.Unsaved
datamaybelost.Toresetthecomputer,pressand
holdthePowerbuttonforeightsecondsormore.If
thecomputerstilldoesnotre
set,removetheAC
poweradapter.
Display panel problems
The screen is blank. • Dothefollowing:
‐ Ifyo
uareusingtheACpoweradapterorthe
battery,andthebatterystatusindicatorison,press
F12(
)tomakethescreenbrighter.
‐ Ifth
epowerindicatorisblinking,pressthePower
buttontoresumefromsleepmode.
‐ Pres
sF9( )toconfirmwhetherthebacklightof
theLCDscreenhasbeenturnedoff.
‐ Ifth
eproblempersists,followthesolutioninthe
nextproblem“Thescreenisunreadableor
distorted.”
The screen is unreadable or
distor
ted.
• Makesurethat:
‐ Thesc
reenresolutionandcolorqualityarecorrectly
set.
‐ Themoni
tortypeiscorrect.
Incorrect characters appear
on the screen.
• Istheoperatingsystemorprogramsinstalled
correctly?Iftheyareinstalledandconfigured
correctly,havethecomputerserviced.
Sound problems
No sound can be heard
from the speakers even
when the volume is turned
up.
• Makesurethat:
‐ TheMutefunctionisoff.
‐ Thecomboau
diojackisnotbeingused.
‐ Spe
akersareselectedastheplaybackdevice.
Chapter 4. Troubleshooting
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