Toshiba Satellite L70-B - Manual (Page 118)

Problem Procedure
The "USB Wakeup
function" does not
work. When Sleep and Charge function is enabled, the
"USB WakeUp" function does not work for ports
that support the Sleep and Charge function.
In that case, use an USB port that does not have
the USB Sleep and Charge function or change to
disable Sleep and Charge function.
Sound system
In addition to the information in this section, please also refer to the
documentation supplied with your audio device.
Problem Procedure
No sound is heard Press the function keys to increase or decrease
volume.
Check the software volume settings.
Please check to see if Mute is turned to Off
Check to make sure the headphone connection is
secure.
Check within the Windows Device Manager
application to ensure the sound device is enabled
and that the device is properly working.
Annoying sound is
heard In this instance you may be experiencing feedback
from either the internal microphone or an external
microphone connected to the computer - please
refer to
Sound System and Video mode for further
information.
Volume cannot be adjusted during Windows start
up or shut down.
If you are still unable to resolve the problem,
contact TOSHIBA Support.
External monitor
Please also refer to Operating Basics , and to the documentation supplied
with your monitor for further information.
User's Manual 6-12