This is my wife's workout bike and the batteries corroded in the holders so I took it apart, cleaned it up and it works but there's no sound, it used to beep when buttons we're pushed and had voice guided workouts. You could also connect an iPod for music but no sound at all. Everything else seems to work. I checked and the speakers are fine, it all runs through the main board so something is wrong on the board possibly. I was hoping to find a schematic?
Banjomaniac
Banjomaniac