Best answer by AjTrek1
OK..thanks for the clarification. As the connection from your TV to Playbar is direct (i.e. not over wireless) I'd try the following:
1. Unplug the TV and Playbar for 30 seconds and then reconnect them. TV first then Playbar.
2. If no joy..Use a different Optical cable
3. If that doesn't resolve the problem perform a factory reset on the TV. The downside is by doing so you will loose all of your personal settings and possibly any apps you have installed.
4. Next you have two options:
4a. Submit a diagnostic to Sonos and post the ID in this forum. If you can't wait for a response....
4b. Perform a factory reset on the Playbar. The downside is the same as with the TV if you have been storing playlists on the Playbar they will be lost.