Sony VGN-SR380Y/H User Manual page 205

How do I change the sound output device?
If you do not hear sound from the device connected to a port, such as the USB port, HDMI output port, optical output port, or
headphones jack, you need to change the device for sound output.
!
Your computer may not be equipped with the HDMI output port. See the online specifications to find out whether your computer is equipped with the
HDMI output port.
1 Close all open programs.
2 Click Start and Control Panel.
3 Click Hardware and Sound.
4 Click Manage audio devices under Sound.
5 On the Playback tab, select the desired device for sound output and click Set Default.
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Troubleshooting