Toshiba PORTEGE Z20t-C Series User Manual page 114

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