Acer X5950, X3950 manual Some or all keys on keyboard do not work  Keyboard

Video and Monitor-Related Symptoms

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

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 71