Dynex TV Turns Off As SOON as I use Airplay Mirroring Apple TV 4K

peglegjack

macrumors 6502
Original poster
Jul 30, 2011
376
102
Brooklyn, NY
Title says most of it. As soon as I use Airplay Mirroring on my Apple TV 4K, the TV shuts off literally a second or two later. It does this on my MacBook and iPad no matter what is open. I tried turning off Home Sharing which did nothing.

So as of now, it basically a feature that I can't use. Anyone thinks they know what could be going on?
 

peglegjack

macrumors 6502
Original poster
Jul 30, 2011
376
102
Brooklyn, NY
It's possibly something in your TVs HDMI-CEC settings.
I looked, through I couldn’t find anything remotely like that. I should say that I had a Apple TV 3rd gen hooked up to it a couple months ago, and this didn’t occur.

Would it have anything to do with running a Plex server?
 

davidoloan

Suspended
Apr 28, 2009
421
72
I looked, through I couldn’t find anything remotely like that. I should say that I had a Apple TV 3rd gen hooked up to it a couple months ago, and this didn’t occur.

Would it have anything to do with running a Plex server?
I don’t think it’s anything to do with Plex. The fact that it didn’t happen with your 3, but does happen with your 4K makes me think more strongly it might be a HDMI CEC issue.

Can you turn the TV on and off with the TV button on the Apple TV controller?
 

peglegjack

macrumors 6502
Original poster
Jul 30, 2011
376
102
Brooklyn, NY
I don’t think it’s anything to do with Plex. The fact that it didn’t happen with your 3, but does happen with your 4K makes me think more strongly it might be a HDMI CEC issue.

Can you turn the TV on and off with the TV button on the Apple TV controller?
That's another thing actually. Sometimes the TV doesn't turn on with the Apple TV, and I'll have to push the TV button repeatedly before it kicks in. It's in sync the vast majority of the time, and the volume controls work, but every once in awhile one turns off without the other.

The TV is this model:

https://www.dynexproducts.com/pdp/DX-40L150A11/9693695

I looked and didn't find anything having to do with HDMI CEC or InLink (which is the term I think Dynex uses for it). I tried unplugging the HDMI and power from the Apple TV, then unplugging the TV, then plugging everything back in, and it's still doing the same thing.

Is this just going to be a problem with this TV or is there something else that I'm not understanding?
[doublepost=1509197896][/doublepost]Update: I was able to find one workaround. I went into Settings, then Remotes and Devices. Under Home Theater Control, I turned off "Turn On Your TV with Your Remote". So now when I go to Airplay, the TV doesn't turn off anymore.

The main issue with doing this is that I have to adjust this setting every time I want to use Airplay so that I can still turn on the TV with the Siri Remote. If anyone can find out a better solution, or has had a similar issue in the past, I'm all ears.
 

cynics

macrumors G4
Jan 8, 2012
11,304
1,696
That's another thing actually. Sometimes the TV doesn't turn on with the Apple TV, and I'll have to push the TV button repeatedly before it kicks in. It's in sync the vast majority of the time, and the volume controls work, but every once in awhile one turns off without the other.

The TV is this model:

https://www.dynexproducts.com/pdp/DX-40L150A11/9693695

I looked and didn't find anything having to do with HDMI CEC or InLink (which is the term I think Dynex uses for it). I tried unplugging the HDMI and power from the Apple TV, then unplugging the TV, then plugging everything back in, and it's still doing the same thing.

Is this just going to be a problem with this TV or is there something else that I'm not understanding?
[doublepost=1509197896][/doublepost]Update: I was able to find one workaround. I went into Settings, then Remotes and Devices. Under Home Theater Control, I turned off "Turn On Your TV with Your Remote". So now when I go to Airplay, the TV doesn't turn off anymore.

The main issue with doing this is that I have to adjust this setting every time I want to use Airplay so that I can still turn on the TV with the Siri Remote. If anyone can find out a better solution, or has had a similar issue in the past, I'm all ears.
After doing this will your MacBook actually mirror its display?
 

peglegjack

macrumors 6502
Original poster
Jul 30, 2011
376
102
Brooklyn, NY
After doing this will your MacBook actually mirror its display?
Absolutely, but I have to change the setting back in order for my TV to turn off/on with my Siri remote.

In my case, it may just be that I have an oldish TV. I honestly don't know a whole lot about this stuff.