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ARC feeds TV digital audio to your Sound Bar. Check the audio input and make sure it is set to the correct source. If no audio can be heard, proceed to the next step. Computer speakers not connected to PC sound card, or headphone jack. You must find this to hook up your speakers to the projector and get sound while you are watching your film on the projector.
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Aparently it can cause some handshake problem when the device is not compatible. Ensure you have connected your mobile device's audio.
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Drag the top slider to turn your device completely off. I installed Windows 7 with Plex, and this doesnt happen. Right Click on " HDMI Output" and you will find an option which says - "Set as Default Device". There might be other causes, but they are not so commonly faced or reported. say for instance you have a laptop with a Powerpoint that has sound. what is the source of the audio? it's not the projector.
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