94caprice:
I don't think the volume setting is related to the power beep. There is a setting hiding inside the radio's firmware/software for keypad beeps, though, but IMHO, it'd be a tough one to diddle accidentally.
Having both the volume cranked down and that setting changed at one time seems odd, but not impossible, of course.
My question to Joe is whether or not the radio produces any sound at all - an open squelch on an uncoded channel, perhaps? My BCD396XT popped something a few weeks ago that left the radio working fairly well, except that there was no audio at all.... I think the thing (mine, that is) has a monolithic audio amp and it got fried by a voltage spike.
Regards,