Final bit of work I had to do on my sons Data East Jurassic park was replace the cap C2 just off the bridge rectifier on the power supply which was just starting to leak. Checked voltages, plugged everything in... and the DMD is dead.
Getting -114V, -94V, 12V, 5V and 66V at the connector so voltages look ok.
Oddly enough, the high/low voltages both read -118 volts when plugged in.
Anything that can be repaired or should I just resign myself to picking up another DMD? Confirmed it is the display by testing in another pin. Display was crisp with no errors or flaws of any kind at all.
No, not interested in a color dmd, I don't like the game it is, for my kid.