This game uses a Gottlieb System 3 CPU so you need to initialize it if you never did it (factory reset).
In this game you need to
1)open the menu by pressing 7
2)when the menu shows up, you press the left flipper key
3)Next press 1 to do a factory reset and 1 again to confirm
4)Game will be initialiazed, press F3 now to reset the rom and enjoy