topic Re: Q90T intermittent picture dropouts from HDMI source in TV

Q90T intermittent picture dropouts from HDMI source

AppleTux — Wed, 09 Dec 2020 06:59:32 GMT

Hi there,

I have a new 75" Q90T and I am so far pretty happy with it, with just one exception:

I get intermittent picture drops where the TV shows the circle in the middle and then switches to the "no signal detected" screen. Sometimes the picture just drops to a black screen for 1 sec and then returns, while the audio via the receiver continues.

TV is connected via HDMI (eARC port) to a new Denon 2700X - multiple devices are connected to the Denon (UHD player, media box, PS4). Problem happens with all devices so I think the culprit is the TV (I had the same problem with my older Denon 2000X connected to the Q90T, setup never had problems with my old Sony TV).

HDMI cable from the receiver to the TV was already switched and replaced with a HDMI2.1 compliant cable.

Anybody seen a similar effect? It is hard to pinpoint as it (thankfully) only happens once in a while but it is annoying nonetheless...

Thx

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Sun, 13 Dec 2020 08:30:11 GMT

Ok, so I can update on my issue:

It also happens when I deactivate the "extended HDMI signal"
It also happens when I plug the source (in this case media PC) directly into the TV and get the Audio via eARC

So it is definitely the TV itself - there are occurrences when the video signal drops out completely (audio is still running) that I can fix by switching the AVR to another input and then back - so my suspicion is a HDCP handshake issue.

So currently I am pondering returning the TV and look for another brand... 😞

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Fri, 18 Dec 2020 15:53:48 GMT

So, have been eMailing Samsung and had a chat with the support - so far same problem.

Things done:

the whole unplug/drain/plug activity that Samsung recommends if there is no signal at all (didn't apply to me, but anyway) -> no change
Got a new Firmware 1460 and installed it -> no change

What is left of the recommendations is*:

reboot the TV (with 20sec power button press on the remote)
use a different power plug (well, that sounds like tech-voodoo to me, but at this point I try anything)

Problem still alternates between random picture drops (1-2sec) and the dreaded white dot circle following a "no signal detected". Kinda breaks the movie experience...

My return Windows is closing and there is not really an alternative model that I would currently buy from another vendor. That's mostly why I am keeping up with this mess at the moment. 😞

*Note: I do the recommended steps in sequence with testing in between to actually be able to figure out the solution (if there's any)

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Sat, 02 Jan 2021 10:19:18 GMT

Just an update to my situation here:

Since the TV reboot it didn't cut out during a movie/show so far - I am cautiously optimistic that this actually did the trick.

Will give it a bit more time before posting a final conclusion (and I hope I haven't jinxed it by posting this)

Re: Q90T intermittent picture dropouts from HDMI source

BogaMoge — Sat, 02 Jan 2021 20:05:04 GMT

Hi there.

I'm having issues with my Q90T and I've come to the conclusion that iit is an issue with the HDMI handshake between the tv and the devices... See this thread if you want more information.

What I have tried :

- changing HDMI cables

- changing HDMI ports

- unplugging everything (power cable included), hold/press on/off button on the remote for 30 sec, then wait a few minutes

- factory resets (multiple times)

I want to see if your solution may apply to my issue, but when you say "tv reboot", what exactly do you mean?

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Sun, 03 Jan 2021 09:35:02 GMT

The recommended reboot from Samsung Support:

Turn on TV
Press Power off button on the remote and keep it pressed down until a Samsung (or in my case QLED) Logo appears

That's quite easy - didn't thought it would change much but either it is a very long ongoing coincidence or it really fixed the issue. But I have been watching/gaming from various sources for accumulated 25+ hours now and didn't have a single picture dropout (*fingers crossed)

Re: Q90T intermittent picture dropouts from HDMI source

BogaMoge — Sun, 03 Jan 2021 10:25:03 GMT

So I did try that (another used on another forum told me to try this method) and it worked the same as my previous method (switching between Game Mode and Movie Mode as many times as needed), but it's still just temporary. My issue is heavy purple ghosting when playing games in Movie Mode, and every time I launch a game, I have to do the switch or the "cold reboot"...

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Sun, 03 Jan 2021 10:38:52 GMT

I need to take a closer look at this the next time I'm playing a game - but I am running the entire setup via an AVR through the eARC HDMI3 port on the TV (so I don't use the Game Input). So far I haven't seen any ghosting and my picture setting is always set to Filmmaker mode with some custom adjustments (I just like the picture better that way and to keep it consistent regardless of movies or games).

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Tue, 05 Jan 2021 09:57:37 GMT

Couldn't see any ghosting while playing a bit on PS4 yesterday - again, using Filmmaker mode and not Game mode or the HDMI4 port.

Re: Q90T intermittent picture dropouts from HDMI source

BogaMoge — Tue, 05 Jan 2021 10:19:12 GMT

You're lucky then. But I'm not alone with this issue, and nobody can even begin to offer a solution, or even an explanation.

The screen and motherboard have been replaced, the issues persist. Add to that the fact that I can consistently get rid of the issue temporarily, and I think it's clear it's not hardware based. But then there is the question of if it's firmware based, why isn't everyone having the same issue...

All I want is Samsung acknowledging the issue and offering an explanation, but Samsung reps looked at the videos and just said that everything is "normal".

It's maddening...

Re: Q90T intermittent picture dropouts from HDMI source

Ernie_P — Tue, 09 Mar 2021 20:55:31 GMT

I am experiencing the EXACT issue with my Samsung qn55q80t. I am also connected to a Denon receiver, model ARV-X6700. I removed the receiver from the mix. Connected things directly to the TV...ie the Amazon Fire Qube, or the Nvidia Shield. Or a Tivo Premire. I will try your suggestion mentioned below to see if it works. I hope it works, I'm getting tired of this issue.

Thx.

Re: Q90T intermittent picture dropouts from HDMI source

rabb1t — Mon, 17 May 2021 04:49:41 GMT

Wondering if this issue has been solved? I am experiencing the same thing...

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Mon, 17 May 2021 06:26:24 GMT

The reboot (as I described) did the trick for me - hasn't happened since (also there have been two firmware updates for the TV since then, not sure if they changed something there as well).

Re: Q90T intermittent picture dropouts from HDMI source

Jaymar85 — Fri, 18 Jun 2021 14:12:33 GMT

I just recently had this 1 sec dropout issue with a Samsung Q50R. The reboot seemed too easy a trick to actually work, but so far after an all night gaming session, no dropouts (fingers crossed).

Wanted to thank you for your post because I couldn't find this solution anywhere else on the Internet!

Re: Q90T intermittent picture dropouts from HDMI source

Ernie_P — Fri, 18 Jun 2021 15:56:37 GMT

No issue continues to occur no matter the reboot solution. Very annoying.

Re: Q90T intermittent picture dropouts from HDMI source

Jaymar85 — Fri, 18 Jun 2021 16:14:29 GMT

How frequent are the dropouts you are experiencing and how long do they last?

Re: Q90T intermittent picture dropouts from HDMI source

Ernie_P — Fri, 18 Jun 2021 17:55:00 GMT

I could be watching something, source doesn't matter, Tivo, Nvidia Shield, FireTVCube, and out of the blue, picture goes black, spinning circle, while this is happening I notice the Denon AVR-6700x display shows output channels dropped, then come back, then you might hear sound first then the image starts playing again on the display. It happens daily sometimes several times while watching something. Other times it doesn't. No rhyme or reason. It does happen more often when changing source input. All my sources go through the Denon, so one output to the TV. Sometimes TV times out and gives you the blue screen saying no source. I can clear it by changing the input on the Denon to something I know always has output like the Tivo. Wait for the TV to sync up then switch back to whatever the source was I wanted to begin with. I'm at a loss. I know people are reporting this issue out there. But nothing from Samsung other than reset the TV. I'm hoping for a firmware update that changes how the TV senses video input. I believe the issue is a bug with that portion of the code. Maybe delay what they do today and stay on target longer. I believe the TV senses something and immediately goes into this search for input mode instead of just staying there for a while longer and maybe totally avoiding what is happening. Just my opinion.

Re: Q90T intermittent picture dropouts from HDMI source

AppleTux — Fri, 25 Jun 2021 06:38:50 GMT

My picture dropouts didn't return so far (fingers crossed) - and they happened while connecting via a Denon AVR or directly to the TV, so it was definitely the TV.

As for the "Input Source" - I would call this the most annoying "feature" of this TV (or of any TV I have ever owned). The insistence of the machine to switch inputs on its own when it "thinks" it doesn't get a signal.

Insert a 4K disc that requires a bit more loading time... TV gives you the circle and then the "no signal message on HDMI1". All the stuff is connected to HDMI3 (the eARC port), so why the TV would switch to another port - that has no connected device at all - is fully beyond me.

Re: Q90T intermittent picture dropouts from HDMI source

MrPaul71 — Tue, 02 Nov 2021 02:20:56 GMT

I cant beleive it but that soft reset has fixed my issue on my tu7100 that I have been trying to fix for months. This is the only place I have seen it mentioned and I tried eveythig you could think of to fix it. Thank you.

e2a apparently my tv got an update that I was unaware had been installed, so just make sure you are up to date. My issue was android box related, I had not tried to fix this issue for some time. Found this article and gave it another go and vola! One of these two things has seemed to have fixed the issue. Good luck guys.

e2a2 I spoke too soon, 48hrs no issue. I have now had six black outs this evening.

The only other option I can think of, that I have been putting off trying, is to use an hdmi switch or splitter in the hope that it will play better with the tv. Still feels like an overly fussy handshake issue.

If I find a solution I will share it here.

Re: Q90T intermittent picture dropouts from HDMI source

Ernie_P — Mon, 01 Nov 2021 12:55:56 GMT

I will not purchase another Samsung TV. After nine months I'm still experiencing this annoying issue. Resetting TV, hard reboots, disconnecting from power for a day or so, firmware updates, etc, etc, have not solved this issue. Come on Samsung do something.