I would assume that the audio is being transmitted to the speakers at a low setting, but it is so quiet you wouldn’t be able to hear it. If you then turn it all the way up there is no sound.However if you then receiver off then back on, you have quiet sound. Then if you so much as nudge the volume down one degree, all sound disappears.I did actually manage to fix it. Not sure how and it might not be a permanent fix. I reset the receiver, manual set all the settings again. Turned it off and then back on and everything works fine now. I think now that it is working again, I don’t think I am going to ever turn it off again.