You look to be going from a plasma DMD to an LED DMD - they run off different voltages

I don't know anything about converting a plasma DMD machine to running LED, but yes, the display you pulled runs off 5V.

The signal is definitely the same on the ribbon cable. The voltage is what I am not 100% sure on

I did this a few years ago. You should be able to follow the power cable from the DMD on Iron Man back to the left of the backbox. You will find a 5V 2 pin connector (going from memory, I think it's 2 pins) there that connects to the 8 pin. Disconnect from the connector from the 8 pin and use the wiring harness that came with the LED DMD. Double check your voltages first but this worked for me on my original IM.

I had a very similar issue with my Simpsons pinball party. I needed to install a new LED DMD and used the advice posted in this topic. My problem now is that the machine resets during gameplay.
I have removed the fuse from the F1 position and I have checked and re-seated all connectors on all boards. Does anyone have any advise as to what I could look for next?

Thanks.

Do you have other mods installed that are lifting from the game's power?

The problem with this method is that it taxes the 5v circuit more than it was designed to handle. It will work in many cases but in some you'll need to hook up an external power supply that outputs 5v. Unplug your DMD and see if the game stops resetting.

I don't have any mods on the machine, it is factory.
I could add in a 5V supply (an arcade switcher), but it is a pain in the butt. I will need to run another cable from the mains for it ( I think). Are there any other solutions available?

What I've done is grab a hdd power supply that comes with a USB hdd kit. Cut the plug off and wires that into the 120v A/C for the bill accepter. Then the 5v from that runs to the DMD.

Good idea about the bill acceptor, unfortunately, this is a UK machine and has no bill accepter. I will have a look at the wiring and see if there is a set of wires that would be attached to a bill accepter.

Most games don't have a bill accepter but the two white and black wires that feed the bill accepter connector are standard.