AppleTV 4K hdmi problems
I need some help troubleshooting a problem with my AppleTV 4K. Back in September, I purchased the ATV4K so that I could get Atmos sound from Netflix. Everything was working beautifully until last week. I made no changes to my system. However, I can’t state if there were auto updates done on the ATV4K, denon 4300 receiver, or Vizio tv.
The ATV4K is routed to my denon 4300, then the denon is routed to a Vizio 4k tv which is vision enabled. I am using all certified high speed premium hdmi 2 hdmi cables by monoprice. None of these cables were changed since it’s been working in September.
I first noticed a problem when booting up and the ATV4K asked if I wanted to “try hdr now”. I had previously set my ATV4K so that it would not use Dolby Vision at all times and only output vision when the content signal was Vision. This had been working fine. ATV4K menus were normal, Netflix hdr and non hdr programming was routed and displayed properly.
I could not get the ATV4K remote to move off of the try selection and to the “cancel” selection. Eventually the menu function just displayed a black screen. Tried unplugging and plugging back in and still nothing got passed to tv. Just ablack screen or no hdmi signal message seen generated by my tv.
So I swap input ports on my denon. No change.
So I connect the ATV4K directly to the tv and I’m back on to seeing something, back it it letting me want to try hdr now. This time I can select cancel and go into the menus and set them up, still with a direct connection to the tv. I play Netflix and I get an intermittent picture. I swap cables, still intermittent.
I run the hdmi cable test and it passes.
Next, I move the ATV4K to another similar but entirely different system. It has a denon 3400 and another Vizio tv with vision. I have similar issues there with different cables and with the same cable used in the first system. I plug in acsony 700 using the same cables as was the ATV4K and can play a uhd disk with Atmos and Dolby Vision without issue through this system using the same cabling as the problem ATV4K was using.
At some point in the process, I was able and did do a complete reset of the ATV4K. I know this worked because I had to re-enter my Apple ID and Netflix password, etc. problems with flickering picture or black still existed after this though. I even had a black picture onlybwhen playing Netflix content. All of the menus looked fine and I even got sound but no picture except for averlays such as the “skip intro” Netflix shows allowing you to skip opening credits. My tv even showed “vision” encoding and 2160 signal on the info screen. But no actual picture.
So I Hook the ATV4K directly to the tv in the second system and this time I go to the menu and enable the hdr. It seems to be working without flickering picture. So then I go through the denon and have to enable hdr again (it seems to know that something is not the same when you change its signal path or connection?) so now Netflix is working fine, vision and Atmos. But now everything is vision and Atmos no matter what the Netflix signal is. But no flickering no black screens. While not ideal, I could live with this.
So I move the ATV4K back to the first system. I am back to getting no picture at all. Tv says no hdmi signal detected. The ATV4K light turns on. So I know it’s getting power. But other than that it looks dead.
Is there anything else I can try?
Vizio M60-D1 | Denon 4300h | 7.3.4 | Oppo DDP-203