Just a quick update: I do, indeed have the "no audio" problem. As often as not (it seems), when I first start up the 970, I get no audio and must switch to another source and back again. This happens even when I want to listen to FM radio, so it appears to be entirely internal to the 970. Oh, well ... I knew this might happen, and I can just live with it, if that's what I must do to enjoy the otherwise flawless performance from this unit. :-|