Could be the on-off switch. Could be turned off. If it's a woodvil, it's on the bottom- switch it all the way to the right. My bad- just read your post again... My mini woodvil had a bad switch, but if you take the switch and push it hard with a thumb nail, right in the middle of the grooves on it, it could restore its functioning (if that's the problem)... give it a try and see if the switch works. Otherwise, you need to check if you have voltage coming to the catch cut...one lead from a multimeter in the middle (positive) and the other (negative) on the
thread that the atty/carto screws into and then hit your button and see if you have something.
If no matter what you try, it doesn't work, it may be in for a trip to Rob.
Did it ever work?