Thanks for your help Mike. It turned out that I had a problem with my KVM switch not taking the audio from the correct port! The issue is now resolved and I can confirm that no speaker (or substitute resistor) was needed in the G4. > Alan: It would NOT be safe to simply short out the > speaker pins. The average impedance of a loudspeaker > is indeed low, from 4 to 8 ohms, but it is not zero. > Try connecting an 8 ohm 2-watt resistor across the > terminals instead. A cheap carbon one is fine. > > Also, check Apple/system preferences/sound/output, > and see what output is selected. > > - Michael B. in Cincinnati > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4 > >