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ledzep1

macrumors 6502
Original poster
Jan 24, 2016
267
97
Can anyone help with an issue with my Apple 4k box, more annoying than an issue really. The apple box is connected direct to hdmi 4 on TV.

When I select HDMI 4 on the remote the apple tv box turns on by itself, great, but then 5 seconds later it turns off again, so I have to turn it back on via the apple remote.

If I turn the Apple tv box on first and then select hdmi 4 it does the same thing and turns off.

I think this is a HDMI CEC issue with the Apple 4k box, but wondering if there is a way to stop any hdmi cec commands getting to the apple box from within the TV settings?

I could turn off Hdmi control on the TV but I want it on for my soundbar as I use ARC.

By the way I have same issue if I connect to my receiver.

I have "control tv and receivers off" in the apple settings.

Has anyone else encountered this, why has the apple TV hdmi control got a mind of its own, if I turn the setting above off it should not be happening, I presume the above "control tv receivers" setting is basically HDMI control, so either mine is faulty or Apple's implementation of it is useless.
 

waw74

macrumors 601
May 27, 2008
4,649
933
it's quite possible it's not the aTV, but either the TV or the receiver. (or a combination of them)
The aTV might just be a symptom, not the problem.

there are HDMI-CEC blockers, there's this cool website, called google, just go there and type in "HDMI-CEC blocker" and it will show you a list.
it can also give you instructions on how to do it yourself, it's just pulling one pin in the cable.

have you tried power cycling the TV (unplug for 15 seconds, not just turning off)
or cycling the HDMI-CEC setting in the TV, off and back on again.

you've got a receiver and sound bar both connected to the TV via HDMI?
it's possible that some how the CEC signal is bouncing around, and when you select a different input on the TV, the receiver sees that and sends out it's own power commands,
try disconnecting the receiver, and see if you still have the problems.

it sounds like you have a bunch of things connected.
and without us being able to see, it's going to be hard to diagnose.

what devices do you have? and where are they connected
even just a list of inputs on your devices would help
model numbers might help if you know them.
like the following

TV - Panasonic x-14
input 1 -
input 2 - bose sound bar
input 3 - denon receiver.
input 4 - aTV 4k

receiver - denon xk47
output - TV port 3
input 1 -
input 2 -
 
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ledzep1

macrumors 6502
Original poster
Jan 24, 2016
267
97
it's quite possible it's not the aTV, but either the TV or the receiver. (or a combination of them)
The aTV might just be a symptom, not the problem.

there are HDMI-CEC blockers, there's this cool website, called google, just go there and type in "HDMI-CEC blocker" and it will show you a list.
it can also give you instructions on how to do it yourself, it's just pulling one pin in the cable.

have you tried power cycling the TV (unplug for 15 seconds, not just turning off)
or cycling the HDMI-CEC setting in the TV, off and back on again.

you've got a receiver and sound bar both connected to the TV via HDMI?
it's possible that some how the CEC signal is bouncing around, and when you select a different input on the TV, the receiver sees that and sends out it's own power commands,
try disconnecting the receiver, and see if you still have the problems.

it sounds like you have a bunch of things connected.
and without us being able to see, it's going to be hard to diagnose.

what devices do you have? and where are they connected
even just a list of inputs on your devices would help
model numbers might help if you know them.
like the following

TV - Panasonic x-14
input 1 -
input 2 - bose sound bar
input 3 - denon receiver.
input 4 - aTV 4k

receiver - denon xk47
output - TV port 3
input 1 -
input 2 -

Hi

I only have a soundbar, its a Yamaha YSP2700, I have tried some of the things you mentioned already with no luck, it was the same on my older TV so I think it's the Apple TV 4k box that is the problem, I could try pulling the pin or a CEC blocker.

I can put up with the issue its just a little annoying, I might even get the new Apple TV 4k box, which might hopefully solve this anyway.

I did read somewhere about HDMI control on the Apple TV being problematic.

Thanks for the help.
 

FarmerBob

macrumors 6502
Aug 15, 2004
313
103
In the beginning while I was learning how the ATV4K interacted with my TV, I finally had to turn off HDMI-CEC and EVERYTHING for everything. I now use my Echo to control everything and the only problem I have had all along, is while the ATV and TV are doing the "Handshake" thing, my TV often reverts to input #1 or an input with an already active connection if the ATV takes too long. But if the ATV is on first and I switch the TV over it's less apt to switch back. I know it's a TV thing. I think it's Samsungs' Blue Screen "No Signal".
 
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ledzep1

macrumors 6502
Original poster
Jan 24, 2016
267
97
If you want to disconnect CEC for aTV only, you need to connect it to TV via CEC eliminator:

Cheers, I think if it comes to it I might just attempt removing pin 13 myself as thats basically what them adaptors do.
 
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