I have the Star Trek pachinko machine, and when I add enough pachinko balls to fill even 1/4th of the top load tray the machine begins to spit out balls from the bottom. This action seems to be triggered when the little lever door (inside the ball tray) is depressed. If I don't fully fill the tray and the lever is not pressed by the pachinko balls, the machine functions correctly, though I have never seen it dispense balls for winning.

What could be wrong with it?

On a separate note does anyone know what the different modes do on the back of the machine (the switch adjacent to the volume switch)?

Thank you.