The XPIN's never displayed properly, other than test mode. They displayed full digits, brightly and clearly. With the game idle, and in attract mode, they displayed very little at all, but there was, and still is, no strobing.
If it is the cable, shouldn't the issue be present regardless of what is connected to that harness, even taking into consideration the XPIN's do not use high voltage to do their job? Neither side of the scoring display performs correctly, with the XPIN's, although both test properly.
With the plasma's connected, it is only the right side scoring display, that displayed gibberish, but even that disappeared approximately 6-8 weeks ago. By right side I am referring to the scoring displays as you look at the back-glass from the player aspect of the game. Got that with both plasma's, irregardless of which display was connected to the right side harness.
Additionally, there is no ribbon cable, anywhere in this game. Is that just a generic reference? Or a reference to the connector type? Trying to get the jargon squared away here so I don't post something that I'll later re-read and feel stupid for not posting correctly
Anyway, the game is on right now. I leave my games on, and in attract mode, probably 60-70% of the time. They light the rooms up nicely, and I have found that the games seem to "like" being on over time. Same same with my arcade games. That may just be me, but I put it out there in the way of an fyi
So to sum it up, the plasma's display properly - now - but there is this new problem of strobing. It looks like we have identified the source for that. The XPIN's, there is no strobing, but improper display, other than in test mode. So that is where I am at.
I have not re-pinned any connectors in this game. I have replaced several transistors on the MPU board, to resolve play-field lamps that were not functioning. Outside of that, and the connector pin on the SDB I referenced earlier, there has been no work on this game afaik. The boards in the back, look to be in remarkable shape and I am guessing that they have never been out for service. I do believe these boards may be as they shipped from the factory when this game was new. The original battery is still on the MPU board and is in remarkable shape, with absolutely no corrosion whatsoever.
I plan to replace it with a battery pack as soon as I get the parts I need, as I have seen what a battery can do to an MPU board. But that battery being in there, suggests to me that no work whatsoever had ever been done on any board in the back-box of this game, prior to what I did this past summer. I have pulled the SDB and the MPU boards from the backbox, and they look stock. That there are now issues, may be due to the fact that the game is getting normal use that it may never have had in the past. I don't know it's history, other than since early 2007, when I purchased it. But it is a 32 year old game.