Hi
There is a lot of question to answer first
Do you have installed AHI in your HD? them may be the volume output in AHI prefs, but the right way to test your sound, through paula (I imagine because you havent told nothing) is loading IE a game from floppy disc.
If there is no sound at all then, the sound circuit (amplifier or filter)may have been gone to the way.
Best Luck