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jasonmet77 Author

Level 1

57 points

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

Top-ranking reply

jess300ztt

Level 1

9 points

Posted on Dec 10, 2017 3:37 PM

I’m having the same issue as well. I have an LG 65” SJ8500 with Dolby Vision connected to the Apple TV 4K. I’ve tried turning the SIMPLINK (HDMI-CEC) settings off and on on both the Apple TV and LG and still have the same issue. Glad to find other people having this issue because I almost returned my TV thinking it was defective.

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257 replies

Jul 11, 2018 10:55 AM in response to MichaelT0429

It happens when not in DV as well, so not isolated to DV. I notice it when Frame Rate switching is on. When off, it does not happen.

Jul 13, 2018 2:09 AM in response to jasonmet77

Is it me or did the latest firmware update from Apple make this issue worse?

Jul 26, 2018 12:21 PM in response to jstanphill

Not an Apple issue, although it happens with the Apple TV.

I have the same issue with the Xbox One S.

I think the issue rests with LG, especially when you look at all reports about this issue.

drumtoad

Level 1

13 points

Aug 5, 2018 9:37 AM in response to ArchieCoder

I have exactly the same issue - cutting out, usually for about 1-2 seconds, only with Apple Music played through my LG 4k TV and attached Onkyo stereo amp. Have you figured out a fix?

Sep 12, 2018 9:20 PM in response to jess300ztt

It cost me $80 AUD to get this cable from Amazon.com.au and it did not work for me. I have 2 of the Belkin cables and they don't work either.

Ffogboy

Level 1

13 points

Sep 18, 2018 2:50 AM in response to Ffogboy

So I updated to tvOS 12. Guess what? Same problem. I have an open call with Apple so have let them know. Not holding much hope now. Probably will just return for the second time:(

Oct 16, 2018 4:14 AM in response to stevenfromkambah

Same issue for me with 4K HDR programming, mostly on Netflix that I've tried. The screen blanks for a few seconds every few minutes. My display is a Sony VPL-VW285ES.

Oct 16, 2018 8:40 AM in response to roland6465

Same projector with same problem as Roland above. I had the blanking problem solved until ios12 with an AudioQuest cable.

Oct 16, 2018 9:14 AM in response to Sam Edwards

I opened a ticket with Apple today, and gave them this and the AVS thread to reference. Unfortunately, my ATV wouldn’t reset and update while on the phone, so I’ve sent it to Apple to diagnose.

Nov 12, 2018 9:02 PM in response to jasonmet77

switched from audioquest pearl to the apple store belkin hdmi. no dropout issues now.

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 ?).