Check your Ram. I had Ram go bad after being in for over a year and my system did all sorts of strange stuff. As you point out the problem manifests with time - ie. with many minor corruptions this symptom finally appears. Do check any direct problems possible like your USB sound not starting up properly, but once all that can be eliminated look at the RAM with a checker program for 12-24 hours. jj On Wednesday, February 25, 2004, at 08:08 AM, Cube List wrote: > For some unknown reason, just before I installed Panther, a strange > thing happened: no starting chime! At first I played it off as a need > to rebuild. So I did. The chime returned. Then soon no chime. And since > the installation of Panther, if I have to restart in either OS9 or X, I > put my hand on the cube for the 5 seconds and it shuts down forcing me > to place my hand back again to start it... and with no chime! > > FYI I'm running 832 megs with the standard 128m video card and Panther. > All the other sounds come through just no chime and no other problems. > Speakers plugged directly in the cube. What could be the prognoses?