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51
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Available in the U.S. only for the K-12.
Troubleshooting
DISPLAY PROBLEMS
(cont.)
SOLUTIONS/ACTIONS
The screen is
unreadable or
distorted.
n
Make sure that:
– The screen resolution and color quality are
correctly set.
–The monitor type is correct.
Incorrect characters
appear on the screen.
n
Are the operating system or programs installed
correctly? If they are installed and configured
correctly, have the computer serviced.
SLEEP PROBLEMS
SOLUTIONS/ACTIONS
The critical low-battery
error message appears,
and the computer
turns off.
n
The battery power is getting low. Connect the AC
adaptor to the computer.
The computer enters
sleep mode immediately
after power-on.
n
Make sure that the battery is charged.
– The operating temperature may be too hot.
Move to a cooler environment and try to wake
the computer.
The computer does
not return from sleep
mode, and the computer
does not work.
n
If your computer is in sleep mode, connect the AC
adaptor to the computer, then press the Windows
button or the power button.
n
If your computer is powered-off, connect the AC
adaptor to the computer, then press the power
button to resume operation.
SOUND PROBLEMS
SOLUTIONS/ACTIONS
No sound can be heard
from the speaker even
when the volume is
turned up.
n
Make sure that:
–The Mute function is off.
–The combo audio jack is not being used.
–Speakers are selected as the playback device.
RECOVERY SYSTEM
PROBLEMS
SOLUTIONS/ACTIONS
Fail to restore system
partition to factory
default.
n
The system partition, such as the partition size or
the drive capacity of C, has been modified.
OTHER PROBLEMS
SOLUTIONS/ACTIONS
Your computer
does not respond.
n
To turn off your computer, press and hold the
power button for 10 seconds or more. If the
computer still does not respond, remove the
AC adaptor.
n
Your computer might lock when it enters sleep
mode during a communication operation.
Disable the sleep timer when you are working
on the network.
The connected
external device
does not work.
n
Do not connect or disconnect any external
device cables other than USB while the
computer power is on. Otherwise, you might
damage your computer.
n
When using a high-power-consumption external
device such as an external USB optical disk drive,
use an external device power adaptor. Otherwise,
the device may not be recognized, or the system
may shut down as a result.
Tr
oubleshooting
Tr
oubleshooting