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msanjose
Contributor I
Nov 13, 2026 9:01 PM UTC
Question

TCL TV + Amp + AppleTV audio failure

I have a Sonos Amp connected to the eARC HDMI port of a TCL TV (55Q750G), and generally use it to watch content on an AppleTV 4K (3rd gen).

This setup works sporadically. I can spend hours watching TV without any issues. If I come back a week later there’s a good chance that the Amp won’t play any TV audio until I reboot the TV (other sources to the Amp will still work fine in this scenario).

Is this a known problem with a fix? Is HDMI CEC support just spotty?

2 replies

Schlumpf
Schlumpf
Virtuoso
Nov 13, 2026 9:22 PM UTC

Indeed this seems to be a hdmi cec issue. Some TV depending on their firmware can drop cec connection to the soundbar. 
Often a firmware update on the tv can resolve the problem. Sometimes changing audio settings can help. 
First of all I recommend turning of eARC support on the tv as the Sonos Amp just Support ARC at all. 
Dolby Atmos audio also could be turned off in this case and hdmi audio output can be set to passthrough/ bitstream with Dolby Digital 5.1 as audio format. Also turn off Atmos Audio in AppleTV settings. 

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Ralf
kdowling
kdowling
Nov 13, 2026 11:01 PM UTC

I had a similar problem with my Sony A80J and Beam 2. It didn’t happen often, but required rebooting the TV to get sound back. I haven’t had it happen yet with my new Beam Ultra on the same TV.

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