Toshiba TECRA M5 User Manual page 180

Troubleshooting
Sound system
Refer also to documentation for your audio devices.
Problem
No sound is heard
Annoying sound
is heard
External monitor
Refer also to Chapter 8,
documentation.
Problem
Monitor does not turn
on
No display
Display error occurs
9-16
Procedure
Adjust the volume control dial.
Check the software volume settings.
Make sure the headphone connection is secure.
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.
You may be experiencing feedback. Refer to
Sound system in Chapter 4,
If problems persist, contact your dealer.
Optional Devices, and to your monitor's
Procedure
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.
Try adjusting the contrast and brightness controls
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.
Check that the cable connecting the external
monitor to the computer is attached firmly.
If problems persist, contact your dealer.
Operating Basics.
User's Manual