this is one of the few machines with the extra large dmd.
these have their own on board power supply for the high voltage, which runs off the 12 volt supply.

Things to look out for is make sure the display driver board is getting  +5 volts to it, they can have problems with the connections. and make sure the dmd is getting +12 volts to it.

I just replaced one of these displays in a baywatch and with the shipping the display over $500