Since you've got a new PLAYBAR coming, I'm not sure what you're expecting here.
If you feel like there's no sound coming from the SUB or surrounds, there's several things to be checking. Most obviously, I'd be looking to see if the system thinks it's receiving. Open up the controller app, and look at Settings>About My Sonos System while playing the TV, preferably a movie of some sort, something that has a Dolby Digital soundtrack (not the news, for instance).
If the Audio In line under the PLAYBAR says stereo, then you'll need to look at all of the audio settings for the devices you have connected. Start with the TV set, and make sure that it's set up to pass Dolby Digital through to the optical port. You'll also need to check the audio settings on all devices that you have connected to the TV, any cable/satellite/game/DVD device.
While you're looking in the controller app, take a look at the room settings page for the room that you have the PLAYBAR in. Does it say +Sub, +LS, +RS or does it have some question marks?
Then go in to that room, and click on Advanced Audio, and click on Sub settings, and make sure that the Sub is actually "on". Back up a page, and go in to Surround Settings, and make sure that the surrounds are "on", and Music Playback is set to "Full".
Stream some music to the room that is the PLAYBAR. Is there sound coming from the surrounds now? Is the Sub working?
Bruce