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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
when the volume is turned
up.
• Make sure that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback
device.
Other problems
Your computer does not
respond.
• To turn off your computer, press and hold
the power button for 6 seconds or more. If
the computer still does not respond,
remove the AC adapter.
• 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.
• Do not connect or disconnect any
external device cables other than USB
while the computer power is on.
Otherwise, you might damage your
computer.
• When using a high power consumption
external device such as an external USB
optical disk drive, use an external device
power adapter. Otherwise, the device may
not be recognized.