Toshiba portege m400 Manual De Usuario
9-16
User’s Manual
Troubleshooting
Sound system
Refer also to documentation for your audio devices.
External monitor
Refer also to Chapter 8,
, and to your monitor’s
documentation.
Problem
Procedure
No sound is heard
Adjust the volume control dial.
Check the software volume settings.
Make sure the headphone connection is secure.
If problems persist, contact your dealer.
If problems persist, contact your dealer.
Check Windows Device Manager. Make sure the
sound function is enabled and that settings for I/
O address, Interrupt level and DMA are correct
for your software and do not conflict with other
hardware devices that you may have connected
to the computer.
sound function is enabled and that settings for I/
O address, Interrupt level and DMA are correct
for your software and do not conflict with other
hardware devices that you may have connected
to the computer.
Annoying sound is
heard
heard
You may be experiencing feedback. Refer to
in Chapter 4, Operating Basics.
If problems persist, contact your dealer.
Problem
Procedure
Monitor does not turn
on
on
Make sure that the external monitor’s power
switch is on. Confirm that the external monitor’s
power cable is plugged into a working power
outlet.
switch is on. Confirm that the external monitor’s
power cable is plugged into a working power
outlet.
No display
Try adjusting the contrast and brightness controls
on the external monitor.
on the external monitor.
Press hot keys Fn + F5 to change the display
priority and make sure it is not set for the internal
LCD.
priority and make sure it is not set for the internal
LCD.
Display error occurs
Check that the cable connecting the external
monitor to the computer is attached firmly.
monitor to the computer is attached firmly.
If problems persist, contact your dealer.