Sony VGP-UPR1A Software Manual page 8

Symptom
This product does not work
correctly, or is not stable.
HEADPHONES Connector
Symptom
The sound is distorted.
The sound level is too low or
there is no sound at all.

GB
Cause/Action
Disconnect this product from the personal computer's USB connector,

then disconnect the AC adapter of this product (or, if your model has a
power switch, turn it off). Wait for a few seconds, reconnect the AC
adapter (or, turn it on), and then reconnect the product to the personal
computer's USB connector. For details on how to disconnect this
product, see "Disconnecting the product" (see the instruction manual
supplied with your product).
Cause/Action
The output signal is too strong.

Decrease the volume of the personal computer.
Decrease the volume of the playback software for music, DVD, etc.
If the product is connected, the product's HEADPHONES connector

output is prioritized. If you are willing to output from the personal
computer, change the settings.
Disconnect the product from the personal computer and check if the

playback sound is being output from the personal computer itself. For
more information, refer to the instruction manual or online manual
supplied with your personal computer.
The USB cable is not connected securely.

Connect the USB cable correctly.
The output signal is too weak.

Increase the volume of the personal computer.
Increase the volume of the playback software for music, DVD, etc.
The product is not selected in the audio settings of the personal

computer, or the sound setting is low.
Check the audio settings of the personal computer. For more
information, refer to the instruction manual or online manuals
supplied with your personal computer.
The USB cable is disconnected or connected while the playback

software is in use.
If the USB cable is disconnected or connected while the playback
software for music, DVD, etc., is activated, the sound output of the
product and that of the personal computer (internal speakers, etc.)
may not switch correctly. Connect or disconnect the USB cable after
you have exited the playback software.
Check the audio settings of the personal computer. For more
information, refer to the instruction manual or online manuals
supplied with your personal computer.
The device is set to mute.

Turn off the mute setting.