Mr DO PCB question

I have 2 PCB's for Mr Do!

One plays the right way up, one plays upside down. The problem is, the one that plays upside down works perfectly and the one that plays the right way up (the same way as vertical shooters) has a few cracks and the sound will not work.

I can rotate the monitor if I wanted.. Just seems strange that 2 PCB's would act differently. The DIP switches are all in the same positions and the service/test buttons do nothing.

This is just a query, like I said I can rotate the monitor, but if there is a simpler way to invert the picture 180 degrees through the board that would be better to keep the game compatible with the others. I am not trying that trick by switching the wires because this is just for one game.

Thanks.

It sounds like one is the cocktail version. I have never had Mr Do but I would have thought the cocktail mode settings (means its a tabletop game where players sit opposite each other) would be done via the DIPs rather than a different game revision (on ROMs).

Raz