I've seen the issue with AppleTV (and Roku as that goes) not streaming certain content in the past.?
Just had a case a few weeks ago where the Apple TV would have sound but no picture when streaming some Acorn programs -- the picture would appear at the beginning of the steam but very quickly go black.? No DM in this system in this case but there was a Denon receiver and a AVPRO HDMI video balun between the Apple TV and the TV.? My go to fix when this happens is to connect the AppleTV directly to the TV and use either Toslink or ARC to get sound back to the receiver.? The other solution I find that works is replace the balun with a Crestron DM-TX-xxxx and DM-RMC-4KZ-100-C balun system -- it is the only balun system that I have found that works consistently.
Probably not a good solution in your case.? But I avoid putting a receiver or active HDMI cable or balun between the source and the TV at all cost -- just have had too many issues with having other devices in the HDMI path.
