I am having an issue with a NF dmd not working. I have checked the dmd in another game and the dmd does light up and work properly. I pulled the fuses on the dmd board and they tested fine, reseated all connectors including the ribbon cable.
I tested voltages at the plug that attaches to the dmd and they appear to be correct.
Plug/Wires:
Orange 122.2 V
Blue 121.3 V
Pin
Black 0 V
Black 0 V
Grey 5.1 V
Grey/Yellow 12.4 V
Brown 14.1 V

I also installed a different ribbon cable from a different machine and that did not help. I am not sure what else I can check as I have power to the plug that attaches to the dmd. I have also tried using a spare dmd and that would not light up as well.

Any ideas or what I should look at next? Any assistance would be greatly appreciated.

Thank you all for the responses. This gives me a good starting point and I will research on why I am not getting the correct voltage. Thank you fellows for the quick response.

Thanks guys for all of the options, I had no idea so much was available.

Update, I have access to a rottendog dmd board that I can borrow from a friend so I am going too install that to see if it takes care of the problem. If so, I may just get the board repaired depending on the cost or purchase a new board. I will have access to the game tomorrow so I will update you all on what I find out.

Thank you again for the responses.

Rottendog was installed and dmd is now working, I plan on having the board that was removed looked at by Rob Anthony at GSPF to find out if it is repairable. Thank you again for the information provided.