I've had the Q930D soundbar connected to my QN90C TV for over a year without issue.
This week, I noticed that I couldn't use some of the sound features, like Q-symphony or surround. Of course, both of these options worked without any issue for the past year. Whenever I attempt to choose the option to use Q-symphony through the TV, a pop-up displays "Q-Symphony is not configured."
The Soundbar didn't disappear from my SmartThings app, but it displayed it as "offline" even though the soundbar was ON. My TV remains there. Whenever I tried to reconnect via Bluetooth, the option simply remained as "BT" instead of "BT ready" or "BT Pairing", even after the hard reset of holding down Volume + and Volume - for 10 seconds.
I've done some digging on old threads, and apparently this was a common issue that might be fixed through disconnecting the power cords and letting the system quiet for a couple of days. It didn't work.
Samsung assistance requested a video call, where over 39 minutes we attempted every option, including a factory reset of the TV and the Soundbar. The problem persisted.
They asked me to send the soundbar to a local Samsung repair. This appears to be a very similar "handshake" problem that plagued Samsung soundbars last year. I am quite disappointed that the thing simply bricked itself out of the blue.
What now? I have seen some news about Samsung's director stating they would repair affected soundbars free of charge.
