@'bgtees', I have, Yamaha 7790 for some reason with Yamaha's units below their Advantage line which is their premium line has issues with the 'ARC'. read up on 'loveinthehd' post on this thread he is spot on with his comments concerning that issue. I had to disable 'ARC' and use the Optical out on my HDTV. For some reason only Yamaha's mid level units, not saying All of them under the Advantage line..aka, RX,and STR, units have that issue with ARC not being compatible with some manufacturer's audio/video gear. I have had Onkyo,Harman Kardon, NAD pre-pro processor and those units didn't have any issues with ARC. I also recommen disabling the ARC, and using just the 'Optical' out on your TV or PS or Sat box or Cable box just for your ARC. Now you will lose HDMI processing but only for the most recent Surround Sound Processing and THD and MasterHD. You will get DTS, Dolby Pro logic.