This tells me that it is an apple tv issue.
Apple tv 4k hdmi cable problems.
First off you need to unplug the hdmi cable and power cord from the apple tv.
4k video especially hdr10 and dolby vision requires an hdmi cable compatible with these formats.
You need a usb c cable for 4 th generation apple tv or a micro usb cable for 3 rd or earlier apple tv.
Apple recommends hdmi cables that have the compatible dolby vision mark as they have been tested with apple tv 4k and a wide range of televisions.
An hdmi cable on apple tv 4k you need an hdmi 2 0 or later compatible cable if you want to set up your apple tv with your ios device do these things first on your ios device.
If so reset it to match the built in resolution of your tv or video projector such as 720p 1080p or 4k if you have 4k capable tv or video projector.
Next plug a usb c cable on the back of the apple tv 4.
Tv straight to apple tv via hdmi cable.
Use process of elimination.
If your device is connected to an audio receiver or other intermediary remove the hdmi connection and plug it directly into the tv.
Hdmi cable 4k high speed hdmi color cord 3 pack 6ft gold plated connectors velcro cable ties 18gbps 4k 60hz support apple tv hdtv ps4 computer laptop by huanuo 4 6 out of 5 stars 1 098 15 99 15.
I found out it is not the hdmi cable because i can run a dvd player via the same hdmi cord to the tv and it comes up fine.
However they should work on previous hardware and operating systems although the menu names may be different.
A tv or other display with an hdmi port.
A high speed hdmi cable is required and the rgb settings on your.
Besides you also need very good internet connection.
The copper foil shielding prevents interference while well ordered copper wiring boosts signal strength.
Instructions in this article apply to apple tv 4k and apple tv hd running tvos 13 3 with the siri remote.
Maxxter may be one of the cheapest hdmi cables for apple tv but it has got the quality to deliver dependable performance.
Sign in to icloud with your apple id and turn on two factor authentication for your apple id.
An example is the belkin ultra high speed hdmi cable.
Just like any high grade cable it also has the support for 3d 4k uhd.
My setup is very simple.
Update to the latest version of ios.