"Control panel, hardware and sound>sound>manage audio devices>set default> digital audio device. Change back to spearkers and headphones when done."
[ originally posted by "guest" ]
For those of you who are still having a bit of trouble getting sound through your TV using an HDMI cable, and have following these steps and verified that the TV is being seen as a proper display device, make sure that the volume for the TV display device is also turned up.
When you are in "Manage Audio Devices" (follow description quoted above to get there), right-click the symbol for your TV and click "Test." Then watch the bar to the right of the description to see if it starts moving. If it does, and you still can't hear anything, that means that the sound is working properly, but for some reason the volume is turned down, or off. Right-click the description for your TV, then click "Properties," then click on the tab that says "Levels." There should be a volume slider here, and chances are it is set to 0. Turn it to the volume setting you want, then click "Apply." Now go back and try testing the sound again from the previous page. You should hear some sort of a "chiming" sound. That means that you have done it right.
For some reason, I had my laptop volume turned up as high as it would go, but nothing was coming through the TV. When I turned that slider all the way up, it started working again. However, now my volume hotkeys on my laptop actually effect it, where as it didn't before. I have no idea why, but this solved it.