No signal from Apple TV 4k unless I unplug power

Atv signal cutting out intermittently, I have it connected to a LG tv. It seems to only happen when the original signal is not a 4K signal, direct tv now for example with a show on ABC. ABC doesn’t broadcast in 4K so the signal Atv sends out is being up converted. The problem does not occur when watching amazon with a program that’s HDR. If I change the Atv format from any of the 4K options to the 1080p Dolby Vision, the problem goes away. Having to manu switch it back a forth is a bit of a pain, but it works.

Have you updated to latest firmware? (TVOS)

Latest version should fix many problems..

Yes. UpToDate as of yesterday, both the TV and Apple TV

@txfeinbergs - well I guess it's good to know I'm not alone (and good to know you have an LG - so I'm thinking this is something the ATV is causing). Misery loves company I guess!! So when you wake up your system, what do you typically get on the TV when it happens? So far I can get any of the following:

- flashing screen right away upon wake

- flashing screen but only after playing something - either SDR or HDR doesn't matter

- complete snow white screen (can't see any ATV screens)

I am in the process of switching cables again. The past day and a half I had a combo of Monoprice premium from ATV to Denon and Amazon Basics from Denon to Sony X930E. That was actually kind of stable. However, I just ordered two of the Belkin cables from the Apple Store (pricey, but worth it if they work). Just installed them this afternoon. I actually powered everything down when installing them (TV/AVR/ATV) - and then powered up the TV and AVR first and then the ATV. Of course right away the screen was flashing - not a good start. I pulled the TV power and everything came back stable. I was able to do SDR, HDR and Dolby Vision. Time will tell now if they made a difference.

Really not understanding why the ATV has become so unstable where the Roku seems to be stable again. I'll reply back with any results.

I either get the TV screen saver itself (because it thinks there is no signal), a screen of white snow (which is pretty strange for a digital signal), or just a blank black screen. Don't worry about the cables as I replaced all my cables with top of the line cables and that did nothing for this issue (although it did completely eliminate some data errors as seen by white sparkles on a dark screen) (and also greatly improved my Roku Ultimate experience by eliminating pesky HDCP errors and audio drop outs) (I will admit my cables hadn't been upgraded in years and were a mesh-mash of crap)

If you want some REALLY good cables for a cheap price: these work great and support 18 Gbps. (Amazon.com: HDMI Cable 6ft (2-Pack) - Atevon High Speed HDMI 2.0 Cable 18Gbps [Supports 4K HDR, 3D, 2160P, 1080P, Ethern…) My entire setup is now using these.

FYI, if you haven't, also make sure you update the firmware in your AVR to whatever is the latest.

My apple TV 4k cuts out as well. I already returned one and new one does the same. Plays fine for anywhere from a few minutes to and half hour but eventually cuts out and my TV indicates no signal. Sometime holding top two buttons on remove works and it restarts (though from front menu) other times I have to unplug. Apple TV 1 was working fine! with my set up. Must be the 4k HDR stuff. Have been on hold with apple for almost an hour! First call cut out after 30 minutes. HomePod launch must be going well......

I have a Sony 940e TV - I am having exactly the same problems – it used to so go on and off as if the HDMI connection was intermittent – I updated the software to the latest as well as changing to a better cable and now it is a little bit better but it seems like I still have to restart the Apple TV to have it function normally – my latest problem is that if I pause Netflix and come back to it it will not play video – only audio – again a restart of the app appleTV resolves the issue for a a few hours to overnight but comes back – I have had the similar disconnect problem with two separate Apple TV 4K s – I do not think it is the television – nor the cables – however I am ordering a Belkin cable from the Apple store and see if that might help – however I believe it is something inherent to the Apple TV 4K Which is really disappointing as I love the Apple interface

I too have a Samsung TV (MU7500F) and about a month ago, (I've had my ATV4K since February without experiencing this), I started experiencing this "No Input Detected" when the ATV goes idle for awhile. Power Cycling is the only thing that fixed it. Apple replaced it this weekend no questions asked but I noticed today the new one did it again leaving me to think it really is a software issue with the ATV. I really hope they fix this issue soon. It's so aggravating.

That's good news! I haven't had to pull the plug since updating both the TV and AppleTV. 5 days running now...here's hoping it is solved. Will post back here if it happens again.

Turn the screen saver featur on and see if that helps.

Thanks for posting this GIF. I have my ATV running into a Denon X2400H and then into a Sony X930E. I randomly get issues like this when going to watch the ATV. Sometimes it's right away in the menus.....other times it's when I went to play a show. For me though, the only thing that will fix it is a hard reboot (pull the power) from the TV. Nothing else fixes it.

I have switched my ATV to be 4K SDR with Match Range ON, since most of what we watch is SDR content.....so trying to not have so many HDMI handshake issues as the TV switches between HDR and SDR constantly.

Let us know if you ever find a solution.

My ATV 4k was set to sleep after 1 hour and I changed it to never. Been working so far from last night. Hard to say if this corrected my issue since other changes I've made worked for a short time and then back to having to reset the devise. Couple other changes I made at the same time where, turned airplay off and kept my match content settings turned off.

@jolejniczak - thanks for the update. Those were basically my symptoms this morning. After the brief flash I went to play something in Netflix. All I got was a blank screen. Tried Vudu, nothing. A reboot of the ATV fixed it.

Just a quick update as I continue to update my bug report (but haven't heard anything). Last 2 days have been really bad with the ATV and the 930E. Seems each time I turn the TV on, I get the same issue of not being able to play any titles from Vudu, Hulu or Netflix. I can get iTunes movies to play - but it seems to send a weird low res version that it definitely not 4K (verified via the HUD).

Each time a reboot of the ATV solves it all until some unspecified time in the future, typically after the TV is turned off.

I see 11.3b2 is out.....just waiting for the public beta version to install. Maybe that will help things?!?

I still have this problem as well. It only happens after everything is shut down and then later or the next day the you turn everything back on. I think it has to do with the ATV turning when it detects the TV turning on. I was going to get a harmony remote that can control a smart outlet and have it just turn the power to the ATV off when everything else gets turned off but from reading about it, that you cannot put this smart outlet in the harmony activity that is used to turn on the various components to watch tv

1. turn on TV and set to HMDI2
2. turn on receiver and set to AV2 (using optical cable from ATV to receiver as receiver HDMI pass throughs do not support 4K)
3. Turn on ATV (or really wake it but I think it just wakes up when the TV comes on)

I wanted to just have step 3 be turn on smart outlet that the ATV is connected to an that would solve it. Not ideal, but it would work if the smart outlet could be added to the activities of the harmony.

Maybe I could make a custom signal that emulate the rebooting (two top buttons pressed) and put that in the activity as the last step after a 5 second pause or something.