Level 1

4 points

Apple TV 4K NO SIGNAL/INPUT issue

I bought the Apple TV 4K 2022.

I have a Samsung 2022 4K TV.

There is a random problem: when the TV has been turned off for several hours or overnight, the TV says NO SIGNAL when I open the Apple TV with the Apple TV controller. I have to manually select the HDMI source with the TV controller and the signal comes back.

This problem can happen once every two or three days.

This problem never happens when the TV has been turned off for one or two hours.

I tried another cable and another HDMI socket and I have the same problem.

I didn't have this issue with my other 2013 Samsung HDTV and the same Apple TV 4K.

I understand that this problem has been happening for a few years with the Apple TV 4K.

Does anyone have this same problem?

Apple TV 4K (3rd generation)

Posted on Jun 9, 2023 6:49 PM

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Sting74 Author

Level 1

4 points

Posted on Jul 1, 2023 10:13 AM

I think I have solved the issue by turning OFF the "INPUT SIGNAL PLUS" option on the Samsung TV.

This is strange because INPUT SIGNAL PLUS is supposed to expand and have a better HDMI signal AND allow HDR to be outputed by and external device (Apple TV).

But even with INPUT SIGNAL PLUS turned OFF, my Apple TV is still outputing an HDR/HDR10+ image on the TV.

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47 replies

Sting74 Author

Level 1

4 points

Jul 2, 2023 5:33 AM in response to hcsitas

Yes, I will give you an update.

But, I will not install the new cable today because I want to be sure that the problem is related to the INPUT SIGNAL PLUS option. I want to continue my test one our two more days.

Today is the 4th day that I did not have the NO SIGNAL random problem at startup since I have turned off the INPUT SIGNAL PLUS. When the option was turned ON, I lasted a maximum of 4 days without having the problem. So I want to be sure that INPUT SIGNAL PLUS is the real problem.

Because if I still have the problem with the 3 feet cable and INPUT SIGNAL PLUS turned on that means that:

1- the Apple TV is defective and I will have to go to the Applestore for an exchange under warranty;

2- there is simply a random bug concerning the INPUT SIGNAL PLUS option between Samsung and Apple (and it will be not the first time that Samsung is complicating things with Apple).

Sting74 Author

Level 1

4 points

Jul 2, 2023 7:12 AM in response to hcsitas

Maybe INPUT SIGNAL PLUS is just a gimmick that is not mandatory (other brands seems not to have that feature since ont the Internet my searches indicate that only Samsung is using the "INPUT SIGNAL PLUS" expression.

A technician send by Samsung came to my house 2 months ago because I had a probem with the volume down was stucked on my TV. He checked my input problem and told me that the TV was OK and if there was a problem, it comes from the Apple TV. So like you said, if I go to the Applestore and the input works fine on the TV in the store, they will tell me that the problem comes from Samsung and not Apple.

So, if I have the same problem with the 3 feet cable, I will just not use INPUT SIGBNAL PLUS. Anyway, I still have HDR/HDR10+ working even if Samsung's documentation says that I not supposed to have HDR with INPUT SIGNAL PLUS OFF.

Vancouver22

Level 8

37,622 points

Jul 4, 2023 11:55 AM in response to Sting74

No I don’t have that option. I’m just using Bravia sync for the CEC. You can also check the HDMI Connection as well in ATV Settings> Video and Audio > Check HDMI Connection. Do that after you switch the cable.

Good luck!

Jun 27, 2023 2:31 PM in response to Sting74

There’s a ‘Lindy CEC-less’ adapter I tried. It didn’t work for me. Perhaps it will for you. My work around is switching my Onkyo Rz-50 AVR to the ATV input, waiting about 30-40 seconds until I get a blue screen and then turning the ATV on. This usually works. Just sucks having to wait that long. If I hook everything up to my LG C1, everything works fine and switches flawlessly. But I use the sub out on my AVR to go to a monitor in my kitchen and you can’t output the ARC to the sub output.

Sting74 Author

Level 1

4 points

Jul 4, 2023 5:19 AM in response to hcsitas

OK I have the same problem with the 3 feet cable when INPUT SIGNAL PLUS is turned on.

So I have to diseable this option, that's it.

But now I have another problem: th TV do not recognized anymore the Apple TV when I plug de HDMI cable.

Sting74 Author

Level 1

4 points

Jun 28, 2023 6:35 AM in response to Tipper264

My TV is programmed to wake up to the last input used: the one that the Apple TV is on.

When I use the Apple Remote to open eveything, I get the no signal issue every 2 or 3 days. I have to use the Samsung remote to select HDMI 1 and I get the image back.

When I open everything with the Samsung remote, I get the no signal issue everytime after 1 or 2 minutes of normal image from Apple TV.

hcsitas

Level 6

13,964 points

Jul 1, 2023 10:46 AM in response to Sting74

Sounds to me like Signal Plus is more demanding on the quality of the input signal i.e. cable length. By turning it off, Samsung is lowering the bar on bit errors. You could be getting a slightly degraded image that the Samsung waves through. Depends on content and may come & go, all undetectable to the naked eye (hopefully).

Not perfect but best under the circumstances. Well done 👍😉

Sting74 Author

Level 1

4 points

Jul 1, 2023 10:59 AM in response to hcsitas

Thanks for the info.

In the AppleStore, the only cable sold by Apple is a Belkin 6 feet cable.

Maybe I will try a shorter cable, but I'm not sure I can do it with my setup because the TV is on the wall and the Apple TV is a couple of feet lower on a shelf.

hcsitas

Level 6

13,964 points

Jul 2, 2023 6:17 AM in response to Sting74

Sure, whenever.

Be reminded that there is no pattern to signal strength ups and down, therefore no pattern to the behavior of gimmicks like input plus, at least none that you can draw firm conclusions from about what’s defective and what’s not.

Which is why Apple won’t entertain any defect claims based on your testing: they’ll hook it up to their TV and if it works fine, it’s not their problem.

For those reasons, just use a short cable, which everyone agrees is better than a long cable, and then find the best way of making it work for your setup.

hcsitas

Level 6

13,964 points

Jul 1, 2023 10:53 AM in response to Sting74

Anything over 5’ is pushing your luck (but Samsung is happy to fake it with Plus off). The issue for high resolution is not the certification but length. Which is why Apple won’t sell long cables.

hcsitas

Level 6

13,964 points

Jul 4, 2023 6:01 AM in response to Sting74

It’s a Samsung issue with a poorly-engineered gimmick, no doubt about it. But yes, continue as proposed, not worth further troubleshooting.

Sting74 Author

Level 1

4 points

Jun 13, 2023 12:48 PM in response to Vancouver22

Hello again,

I just had this problem again today after 4 days off.

I checked and HDMI-CEC is enabled on my TV. So, I start my TV AND my Apple TV by pressing the POWER button on the Apple TV remote.

My TV is programmed to open on the last source used. So, on HDMI 1, on which the Apple TV is connected.

The TV and the Apple TV therefore open simultaneously on the HDMI 1 source.

For some reason, once every 3-4 days (so several ignitions are done without problem), the TV seems to ignore that the Apple TV has turned on at the same time. So I have to go to the TV menu and choose the HDMI 1 source with the TV remote control and the Apple TV image comes back.

Obviously if I unplug and replug the HDMI wire it also works, but it's more tedious.

My TV has been checked by a technician sent by Samsung and I am told that if there is a problem, it is with the Apple TV.

My Apple TV is under warranty until December 2023. I could always go to the AppleStore to do a warranty exchange. But I doubt that the Apple TV is faulty. As a technician told me: an HDMI socket works or does not work. There is no in between.

Sting74 Author

Level 1

4 points

Jun 13, 2023 4:29 PM in response to Vancouver22

Hello,

Thank you for you answer.

OK, so I am not the only one to have this problem.

I guess it is a random problem with the Apple TV 4K hardware or the TvOS. If I go to an AppleStore and they give me a refurb Apple TV (since I am on the one year warranty) I wil have the same "random error".

I have checked an the Anynet+ is active on my TV.

I hope TvOS 17 will help with this problem.

hcsitas

Level 6

13,964 points

Jul 2, 2023 7:16 AM in response to Sting74

Ok whatever, sounds like a good plan. Technicians blaming Apple exist in the hundreds of thousands, maybe millions, it’s a key job skill for them. Why? Easier than learning Apple tech 😁, and more fun too!

Sting74 Author

Level 1

4 points

Jun 10, 2023 3:20 AM in response to Vancouver22

Thank you very much. I will try what you suggest and come back to tell you if it works for me.

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Apple TV 4K NO SIGNAL/INPUT issue