Mark, I already had it unplugged for several days and tried it again, so it's not that. The factory reset is a good suggestion.

John, you may be right about the DAC issue. If I can find someone local, that might not be too costly a fix. Thanks.

I started out with nothing & I've still got most of it left
M60 VP160 QS8 EP350
M22 VP100
Algonquins