So I have been doing some work to my South Park machine while in quarantine. Installed all new LEDs, fixed some plastics, etc. I installed an LCD ColorDMD. After installation, I noticed that it only correctly animates about 75% of the time and then randomly doesn't display correctly. For example, I'll have a score of 500,000 and then it will shoot to 999,100,000 (which distorts the screen to blue) and then will randomly switch back to my actual score in the game with correct animations sporadically. It will also randomly read weird numbers for high scores, credits, etc. It's all sporadic so there really isn't one set pattern for the problem.
I emailed Randy over at ColorDMD (who was super helpful). He suggested replacing the ribbon cable. I replaced the 26 pin ribbon cable and I thought that fixed the problem but, after checking on it again tonight, it appears the problems are back from before.
Anyone ever dealt with something like this? I'm a newbie here so I don't really know where to start to try and diagnose this problem. Any help would be appreciated.