I have: Vizio XVT323SV, Xbox 360 S (slim) console.
I have been using my xbox with this TV via HDMI fine for over 5 months, but now am not getting any audio. Video is working as normal. When I hook the Xbox to another TV via HDMI input, the audio works.
I have tried several things to get it working again with the Vizio, including:
-Different HDMI inputs on the TV.
-Different HDMI cable, that works with other devices.
-Unhooking all other HDMI devices and only having the xbox hooked up.
-Reset audio settings on TV.
-Factory reset of TV and re-did system setup.
-Reset audio/video settings on 360 (Y and RT method).
-Switched Audio outputs on xbox between Dolby Stereo, Dolby Digital, and Dolby Digital with WMA)
-Switched Digital Audio setting on TV between PCM, Dolby Digital, and off.
-Made sure TV speakers are set to ON, and the mute setting isn't on (getting into the obvious stuff now).
-Checked all HDMI connections and made sure everything is securely connected.
-Disconnected any other type of device connection to the TV (VGA, etc).
-Removed 360 hard drive for one minute, reconnected it. (have heard this can help solve strange audio issues).
Additionally, other HDMI devices work fine with the Vizio. Given that HDMI audio does work on another TV, and I have tried different ports, cables, and setups on the vizio with it making no difference, I think I have narrowed it down to being something at issue with the Vizio. It could possibly be a setting on the Xbox making it not work with this particular TV, but I don't see what that could be.
My thanks in advance for any help you can offer.