Toshiba M40 User Guide

User’s Manual

9-19

Troubleshooting

Monitor

Refer also to Chapter 8, 

, and to your monitor’s 

documentation.

Sound system

Monitor does not turn 

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. 

No display

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 

display. 

Display error occurs 

Check that the cable connecting the external 

monitor to the computer is attached firmly. 
If problems persist, contact your dealer. 

No sound is heard 

Adjust the volume control dial.

Check the software volume settings. 

Make sure the headphone connection is secure.

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.
If problems persist, contact your dealer.