Apple TV 4K Random HDMI Signal Loss

Anyone have a similar issue they have solved? I originally had the issue of flicker that was solved on my LG C7 by changing motion to User set at 0, but an issue I am having is the signal from my ATV to the TV drops out randomly. Usually I can make it through a show, but a movie it will drop at least once. Audio seams to reset here and there too, but it comes right back with the little Dolby Vision logo on the TV flashing. To get the picture back I have to put the ATV to sleep and then turn it back on. If it wasn’t for the free 4K iTunes upgrades I think I would just be done with this thing. I have tried brand new cables too by the way.

Posted on Nov 18, 2017 7:27 AM

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Bruce Anderson2

Level 2

203 points

Posted on Dec 31, 2018 10:27 PM

First test after two new cables was a success! I started reading about exceeding 15' cable length -- weird because I saw cables in the store today that were 25' and 35' long. I went from 23' overall of 4K SIIG Woven Cables (2M from Apple TV to Onkyo TX-NR686 receiver & 5M from receiver to a Samsung 4K television) to 16' overall of 8K SIIG Ultra High Speed Cable (4' from Apple TV to receiver and 12' from receiver to Samsung TV). I need to do some more testing but it's currently 100% better than before.

Strange that I haven't seen anything on this 15 foot idea in either the Samsung or Onkyo manuals -- just web forums dealing with this Apple TV signal drop-out issue. Ugh..., it was like getting hit with lightning bolts. Anyone else out there heard about this or is it urban folklore?

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257 replies

Nov 21, 2018 11:14 PM in response to Sam Edwards

I had dropouts even though I have a Dolby vision capable tv

Switching to the Belkin solved my problem

Dec 21, 2018 10:24 PM in response to Bruce Anderson2

p.s., My HDMI cables are 4K (SIIG?) between the AppleTV, Onkyo, and Samsung. I thought they were pretty high end cables. AppleTV to Onkyo is a 2M, Onkyo to Samsung is longer (5M ?).

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Apple TV 4K Random HDMI Signal Loss