Apple TV 4k not switching on TV sometimes

Question

Level 1

28 points

Apple TV 4k not switching on TV sometimes

Hey community,

I've bought recently an Apple TV 4K, my first one, and connected it to my Philips 65OLED805. The Apple TV runs the latest OS and I'm using a high-speed HDMI cable to ensure I have sufficient bandwidth and capability between my TV and the Apple TV.

However, without having identified a specific pattern, in 2 out of 10 times, when switching on the Apple TV, my TV doesn't get switched on.

Any ideas why this could be the case? Any ideas to identify the root cause?

Thanks,

Mike

Apple TV 4K, tvOS 16

Posted on Oct 28, 2022 11:48 PM

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Answer 1

Rudegar

Level 10

178,794 points

Oct 29, 2022 02:20 AM in response to mikettttt

it turn on the tv by means of hdmi-cec Consumer Electronics Control - Wikipedia

since it works sometimes then one would assume it's enabled in the tv's settings,

if it was me then I would check in the tv's software if there were a newer firmware one could update to

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Answer 2

Rudegar

Level 10

178,794 points

Oct 29, 2022 03:58 AM in response to mikettttt

if it was me then I would try disconnecting the tv and appletv from AC power for 30 sec and reconnect to see if it had any effect

otherwise, I suppose I would wait here for other suggestions and or try asking in the philips tv forum

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Answer 3

vazandrew

Level 8

40,660 points

Nov 11, 2022 09:38 AM in response to mikettttt

CEC is dependent on the TV and each manufacturer has their own implementation. If the TVs firmware is already up to date and the issue persists then you will need to consult with Philips so they can investigate.

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Answer 4

wild sun

Level 1

24 points

Nov 11, 2022 11:18 AM in response to mikettttt

I have noticed the same behaviour. I haven't narrowed it down yet, but it would appear that when the power button doesn't turn the TV on, pressing the 'screen' button on the remote will.

I have also had repeated WiFi issues with the AppleTV 4K that I seem to have solved by turning off the HomeKit hub functionality. With the HomeKit hub function on, there was a spurious entry in my router's DHCP tables associated with 'Unkown' (sic) and an IP6 address. The misspelling is worrying.

This has made me wonder if having hub enabled also stops the AppleTV 4K from sending a wake-up signal to the TV until you actively have a TV app sending a signal over HDMI. Just thinking out loud at the moment but, I agree there is something weird with CEC wake-up and, for me, WiFi and HomeKit hub :)

cheers -- gregor

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