Sony VAIO VGX-TP - Manual (Page 145)

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Troubleshooting
What should I do if I do not hear the sound from the sound output device connected to the
HDMI OUT or OPTICAL OUT port?
❑ Once you have connected a device to the HDMI OUT or OPTICAL OUT port, you need to change the device for sound
output if you want to hear sound from the device.
To change the sound output device, follow these steps:
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.
❑ If you still hear no sound from the sound output device, follow these steps:
1 Follow steps 1 to 4 above.
2 On the Playback tab, select the HDMI or S/PDIF icon and click Properties.
3 Click the Advanced tab.
4 Select the sample rate and bit depth (for example, 48000 Hz, 16 bit) which the device supports.
5 Click OK.