Acer Aspire X3950 Service Manual page 79

Video and Monitor-Related Symptoms
Symptom / Error
Serial or parallel port loop-back test failed.
Printing failed.
Printer problems.
Keyboard-Related Symptoms
Symptom / Error
Some or all keys on keyboard do not work.
Power Supply-Related Symptoms
Symptom / Error
Pressing power switch does not turn off
system. (Only unplugging the power cord
from electrical outlet can turn off the
system.)
Pressing power switch does not turn on the
system
Executing software shutdown from
Windows98 Start menu does not turn off the
system. (Only pressing power switch can
turn off the system).
No system power, or power supply fan is
not running.
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined
Problems" on page 74.
Chapter 4
Make sure that the LPT# or COM# you test is the same as

the setting in BIOS Setup.
Loop-back.

Mainboard

Ensure the printer driver is properly installed. Refer to the

printer service manual.
Printer.

Printer cable.

Mainboard.

Refer to the service manual for the printer.

Check or do the following in sequence
Keyboard

Check or do the following in sequence
Ensure the Soft-off by PWR-BTTN. in BIOS Setup of Power

Management is not set to Instant-off.
Power switch cable assembly

Ensure the power override switch (situated at the back of the

machine, just above the connector for the power cable) is not
set to OFF.
Power switch cable assembly.

Load default settings.

Reload software from Recovery CD.

Power Supply

Mainboard

Action/FRU
71