Toshiba Computer L300 - Manual (Page 147)

User’s Manual 9-13
L300/L300D series
External Monitor
Refer also to Chapter 8, Optional Devices , and to your monitor’s
documentation.
Sound system
Problem Procedure
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.
Problem Procedure
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.