I've only had the receiver since February 2019. One night things are fine but the next evening I turn on the system and no sound from the speakers. I get no sound from cable TV, Xbox One or Xbox 360. Denon support had me run a speaker test and heard white noise. Speakers are connected as Denon support instructed. I have 5 speakers. What in the hell could have happened from one day to the next to lose my sound? I have not fiddled with anything until looking at things from support. I figured it was some setting but if it is I haven't tried the right thing yet. Any suggestions?