Hi, i've had the Beam connected to my Sony TV for the last year with no problems but it has suddenly stopped putting TV sound out. The Sonos app is connected to TV and the TV is recognising the connection to the Beam in the Sync menu. When I use the TV remote to adjust the volume i can see the volume moving on the Sonos app but there's no sound coming through at all. I've been through the usual process of powering everything down, disconnecting, reconnecting then resyncing but the issue remains. Any ideas?