In the last few months, I've experienced some issues with the new Molex connectors and crimp pins inside them. The issues I've seen has been that the crimp pins either not securing inside connector housing and being pushed out or the crimp pin not seating properly against the header pin on the board. These can be difficult to diagnose. This sounds like it could be a similar issue.

I'd peek at connector CN2 on Node 8D. With the playfield in vertical position, this board is in the lower left hand corner of the bottom of the playfield. The pins I'd specifically look at are pins 7,8 and 9.

Pins 8 and 9 (red wires) are your power source and both should be +5 VDC. Are you handy with a DMM?

Pin 7 (yellow-brown wire) is your return wire to the transistor that drives the flasher.

Check those wires on that connector with a wiggle and a slight pull and report back. We can get more technical after, if needed.

Sounds like you have a grounding issue somewhere.

If you have alligator clips and a 9v battery, you can disconnect the flasher and test it. What kind of flasher is it, bulb or light board? Sounds like a bulb since you said you switched it. Could also be a bad socket.

What happens if you unplug the flasher connector and plug it into another Flasher connection? Same result?

Per the manual, the part number is to a flasher light board. Definitely sounds like it's grounding somewhere. Maybe an issue with that particular flasher light board or a hardware issue on Node 8D.

If your wires going from that flasher board are not pinched in any way or grounding out to something then it's probably a crappy mosfet or tip on the node board. You can easily swap the node board under the game there are two that match, you just have to re dip switch them, you can verify the node numbers and part numbers on the quick chart that comes with the game the chart will show the dip settings as well. Do with game off obviously- see if problem moves.

Fidel, that game only has one "8D" node board. It's not a simple as swapping a Node "8" with a Node "9". 8D is a completely different part number.

Which ones? Anything attached to a flasher? It could be a diode issue due to an improper hook up. I recently fixed some ghosting I had on my LOTR despite the LEDOCD board. It turned out that the mod wires were connected improperly.

LOL
I thought he shaved his beard a couple of months ago

That flasher was notorious for shorting to the scoop I think. Take the plastic off or isolate the socket and test again if you haven’t.

I had to get a new board from stern for my flasher when it went out for my Deadpool. You just might be SOL as well

I contacted Stern and went thru the steps to confirm that it was the board. They know their stuff there in the diagnostics dept (no sarcasm).

I did this on a premium Ghostbusters, I think it had two of the same node board part numbers, I DID suggest he verify

Beard is back babeeeee

I had the same issue. It’s the node board
Got a replacement fixed immediately

you are right, you can absolutely swap node eight and nine I just assumed the flash lamp plugged into one of these, however the charts do indicate 8D is driven from node 8, swapping them could help but maybe done in vain. OP if you do decide to swap the two node boards just to see do not do so unless you're absolutely sure the wires are not pinched/shorted which according to other posters is a problem.

That's the one!