If you own the original PCB, probably the suicide battery is empty..? I so, then you will probably be better of buying another PCB..

Another possibility is a ROM failure..?

> The magic buttons for both players freeze the game when pushed. All characters,
> both player and enemy, are still visible, they just don't move. What could be
> some possible causes of this, and how could I go about fixing it? thanks.
>
> jason
>