Hi,
Method 01:
Step 1:
a)
Enable Digital Audio (S/PDIF) in your volume control options.
b)
Connect your HDMI from your computer to your TV’s HDMI/DVI input port.
c)
Set your TV input to HDMI/DVI input. You won’t have sound yet.
d)
Turn off your TV, and turn off your computer.
e)
Turn on your computer first and your TV second. Wait for your computer to boot before turning on your TV. If you get sound out of your computer when it boots, something
is still not right. If you got it working, your computer sound should be dead audio wise. Even your headphones shouldn’t be working. All audio should be going to the HDMI port. If it’s not working yet, try setting Digital Audio as your default, although
this shouldn’t be necessary. Unplug headphones and all other non-HDMI output from your computer. Reboot your computer. If sound comes out of your computer on reboot, it’s still not working. Keep playing around with sound options.
f)
f. Boot sequence is critical. Computer first, TV second.
g. When you get to the point where computer sound is disabled. Turn on your TV. It will be working.
Step 2:
Once you get the TV sound working, you can use the TV audio output and connect it to your PC gaming speakers for awesome sound.
a. Make sure you are connected to the TV via HDMI.
b. Switch to projector only.
c. Open sound control panel.
d. Right click on your digital TV make as default playback device.
The next time you try to play anything with your HDMI cable the video and audio will work without setting anything.
Method 02:
I would suggest that you download and install the updated drivers for the video adapter by visiting the computer or adapter manufacturer website and check if the sound works on the computer.
Update a driver for hardware that isn't working properly
http://windows.microsoft.com/en-us/windows-vista/Update-a-driver-for-hardware-that-isnt-working-properly
No sound in Windows
http://windows.microsoft.com/en-US/windows/help/no-sound-in-Windows
