I lost my sound with the beam which was plugged into my Samsung tv; when I clicked onto see if the sound was working it showed voice was coming through. I changed my beam from the living room; same thing happened then replaced the second beam hdmi and it worked. Why would the beam hdmi fail as only had the beam for 3months. Can I use any hdmi cable for the arc function to work as at the moment only have one of my sonos systems connected