With my 4K Apple TV device HDMI plugged into my receiver, all CEC actions fail for all devices. I can plug in my older HD Apple TV and all is happy. Or removing the 4K device resolves the issue as well. I've just updated the 4K to tvOS 14 with same symptoms.
Anyone else experience this? I think the device itself has failed.
Cheers.
Apple TV 4K, tvOS 14
I had the exact same problem with TvOS 14.2 however I have had this problem in the past and for me I solved it the same way I did last time. It seems to be some form of issue if the ATV gets automatically updated while the TV is in standby mode. The solution is to put the apple TV into standby mode then put the TV into standby and unplug the cable to the TV wait for 10 seconds put the cable back in then turn on the Apple TV then my Apple TV is able to control the TV both on and off again. Not sure how CEC works exactly maybe it sends its command capabilities or something on start up so when the TV is powered on the Apple TV gets information about the TV or something. So my suggestion try unplugging and plugging stuff in again until it works it did for me at least.
What i did:
Same problem, fixed it by turning the Air Play off.
Ladies and Gentlemen… ITS FIXED!!! Just downloaded and installed the update. Now I can disconnect this thing from WiFi and never update it again.
What did the trick for me was moving the HDMI cable to a different port in the TV that supports CEC and HDR. The function for Home Theater Control for the Apple TV is automatically turned on.
tvOS 14.2 still doesn't fix this problem.
I tried to disable/enable "Turn on with remote control" in the apple tv settings
This is work only for power off my TV but not for power On...
I would like to point out that this worked perfectly before version 14 !!
in german it is
Einstellungen/Fernbedienungen und Geräte/Tv Geräte und Empfänger steuern
in english i suppose settings/remote control and devices/control TV and recievers
this menu entry also gets disabled when you torn off CEC on your TV
Same observation on my side.
On my TV Sony if I do some manipulations (unplug hdmi re-plug....) I even did a factory restoration of my TV. it works again but only for a short time.
Whereas before tvOS 14 I had no problem at all.
Same here. So I decided not to be lazy and did some basic troubleshooting. Both of my Apple TVs perform on/off function on my Sony upstairs that has not been updated and both have the same issue downstairs with updated Sony TV. After going to Reddit with my issue, it appears that it’s an issue with that update and everyone seems to be experiencing it. So I guess we just wait for another update and refrain from updating any other TVs until it’s fixed.
Reconnecting HDMI cables after each update works but it feels like debugging a Windows XP 20 years ago, not proper for an Apple product....
With other devices there is no problem, only Apple TV (4K, updated).
Did you try to disable airplay?
I found this and it fixed the problem:
https://www.trustedreviews.com/how-to/hdmi-arc-and-cec-not-working-try-these-fixes-4041394
My experiencie is as follows:
I have a Loewe TV and HDMI-CEC has been working nice until TVIOS 14.2 update.
Now I can't turn my tv on when I turn Apple Tv on. The rest is still working fine.
So I tried to plug the Apple Tv in another tv (SONY) and everything is working fine.
So I guess it is a problem of some tv brands needing a new software update.
Do you use HDMI-CEC with other devices?
Seems like most people here are experiencing this CEC issue just with the Apple TV. Yes changing TV settings, resetting TV etc etc can temporarily fix CEC with Apple TV but what is being glossed over is that HDMI-CEC works fine with all other CEC compatible devices, the only exception is the Apple TV so that narrows things down quite a bit.
Just bought a new ATV 4K with the new Siri remote. It does not switch on or off an LG OLED tv, only the sound bar. Tried toggling the CEC setting on the TV it didn’t help.
Restarted ATV - that triggered something and I was able to switch off tv, but then it would not come on again and it wouldn’t switch off again on the next try.
(Btw, Amazon Fire 4K stick turns on/off the tv just fine)
Separately I fail to understand why the the turn-off button on the Siri remote needs to be held for a second to turn everything off? It’s not even protruding so it cannot be pressed by accident. Also every tv remote has an on/off button in the most prominent place and it works fine.
Why does an ATV user has to keep it pressed for it to work?
tvOS 14.0.2 still does not correct the problem HDMI-CEC power on power off TV !
HDMI-CEC is not working with Apple TV 4K
