I have a new TCL TV with eARC hooked up to a 5 or 6 year old Yamaha RX-A670 AVR using a new, certified hdmi cable. Everything was working swimmingly until this weekend and now the TV is not communicating with the amp. First no arc control, and now no sound even though the input is on TV! I changed nothing, but I went into settings on both devices and everything was still correct. I wonder if compatibility is the issue. The AVR has ARC, but not eARC. Anyone have any thoughts on this?\n\nMy Onkyo TX-NR696 was shipped off to United Radio in New York for repair last Monday and they are already on it. I got a call on Friday from them asking me questions about it. So I hope to hear from them again soon. I told them that I will not be hooking that unit up again, unless they specifically fix something or replace something internal. Then I said I would like for it to just be replaced. She made a note of all of that. If they cannot find the problem, then I do not know what to think Onkyo will do. Meaning, send it back, or send me a new unit. \nSo if I get a new unit, like I think should happen (I will request something other than a 696 if possible), and if compatibility is the issue on my above situation, that will solve that.