Check fuses, had this on my IJ and DH and in both cases had lost 12 volt fuse continuity. IJ spcefically started launching balls and DH have me the message you are seeing. I also have a color dmd in the DH running in blue high definition.

IJ I had shorted out the 12v fuse with a pinched wire, DH I had to remove and replace them, just a bad connection. I think I also swapped the connection of the color dmd on DH. Look for 12v regulated and unregulated.

Hope that solves it, I had small panic when it showed up on DH. Of course I followed my Space Station manual and blew my MPU because it had improper labelling in the manual compared to the board. Luckily damage was only 4 chips and a local pin head has repaired it for me....good luck

I'm working out of town until Monday, can check then. I know I had to change a couple things as I have some mods powered from there

With Dirty Harry, what Randy(Dmod) says it what I had to do. Then no issue.