I should post this in the tech section as well, but I figured that I ask the RFM experts here first.
I purchased my RFM from the OP last fall, and it was working well and then three months ago started acting up. It was hit or miss with regards to even powering up. Sometimes, the game would power up and then suddenly shut down. Then a couple of months ago, it didn't even power up.
I checked out the CPU and reseated the boards and power supply, nothing. I then lifted the playfield and dangerously played with the wiring while it was turned on and discovered it was a connector issue with (? part name) the power diverter, the box between the power plug and transformer. The molex connector had a loose connection and wiring, probably from being knocked around by the wiring bundle each time the playfield is removed and placed back in. When I jiggle the molex connector, the machine powers up, but doesn't hold on even while holding the molex. While giggling the molex, I sometimes see a small spark at one or two of the wired connections. The fuse has been replaced even though it never blew.
I reseated all the wire loops, even re-soldering a couple of the wires that looked a bit loose, but still nothing. I should probably get new molex male pins and rewire everything. Does anyone have any suggestions??? I have sat on this too long now and my son wants a solution so he could get back his favorite game.