[G4] Lost Sound with 10.4

[Richard M. Kriss]

I upgraded to Tiger about a week ago and everthing on this G4 1GHz AGP was
working perfect. The sound started going out with Entourage and now Safari
is muted.  I don't know how to reset sound other than the System Preference
Sound panel.  I can play the various alert sounds from the panel but cannot
get a beep out of the Mac by mousing on the sound level menu bar thing. As I
recall it used beep when you ran it up to full volume.

Any suggestion on how to get a muted Tigher G4 to beep again.

Dick

ps: iTunes is now deaf too. Can't play anything