Both AirPlay and Spotify Connect have worked fine on my Denon X4300H up until now. Suddenly there is no sound. Both still act as if they are connected and the song continues to tick along on the screen of my iPhone, but no sound is coming out. Also nothing is displayed on my TV screen like usual. I don’t believe it’s a hardware issue. Other sources still play and sound fine. Anyone else had this issue? Please help! Thanks!