So I have a hp envy touchsmart 15 notebook pc. I recently hooked it up to my tv with an HDMI cord. I could get the picture up no problem, but the sound wouldn't come through. I clicked on playback devices, but there is no option for HDMI sound. I've installed every update my computer says it needs, so I don't now if that may be the cause, and maybe messed it up.
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