User's Guide

33
return from sleep mode and
the computer does not
work.
connect the AC adapter to the computer,
then press the key button or the power
button.
• If your computer is powered-off, connect
the AC adapter to the computer, then
press the power button to resume
operation.
Display problem
The screen is blank.
• Do the following:
- If you are using the AC adapter, or using
the battery, and the battery status
indicator is on, press Fn+F4 to make the
screen brighter.
- Press the power button to resume from
sleep mode.
- If the 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 screen resolution and color quality
are correctly set.
- The monitor type is correct.
Incorrect characters appear
on the screen.
• Are 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 speaker even
• Make sure that:
- The Mute function is off.