While you wait for Sonos to look at that diagnostic, it would be worth checking the audio settings on both the TV and any device feeding the TV, to be sure an update didn’t change the audio away from Dolby Digital. 

TV settings looks as should yesterday, but I will recheck today.

Thanks.

Note that, as I indicated, it isn’t only the TV settings, but also the devices that feed the TV as well. I’ve had both change, at various times, due to background (unknown to me) updates. 

It’s also worth checking to see that the TV’s output hasn’t failed, by unplugging the optical cable from the PLAYBAR to check to see if there is a red light coming out of the cable. 

Sonos will only be able to tell what their device is doing from the diagnostic, if there is no signal getting to the PLAYBAR, there isn’t much that would show up. 

Cable is working as light goes through. 
TV settings looks fine and also there weren’t any updates in last week. 

Then we wait for a Sonos rep to look at that diagnostic.

Dear Sonos team, any update as I cannot use Playbar?

 Thanks. 

Hi @Aco 

Welcome to the Sonos Community!

Apologies for the delay.

The diagnostics you submitted were submitted while your controller device wasn’t connecting to your Sonos system, so there was no information about the Playbar there.

First, please make sure the Playbar is set to play TV audio.

Please try removing power from the TV for 30 seconds, then power back on. Sometimes the software (or part of it) on a TV can crash, rendering the audio output intermittent or non-existent.

Please also check the optical cable for kinks or damage - optical cables do not like kinks, and they can permanently damage them (even if you see the light from the other end of the cable, that doesn’t mean the signal is getting through cleanly).

If that doesn’t help then to isolate the source of the problem, I recommend you attach the TV’s end of the optical cable to another device, like a cable/satellite box, games console or even another TV. If you get audio from the Playbar, then the TV is the source of the problem. 

If you don’t get audio from the Playbar regardless of what it’s connected to, please get in touch with our technical support team who will get some diagnostics from your system and check what’s happening.