I'm baffled by this one. I have two NBAFBs that I'm working on. One of them is totally functional. The other one keeps having problems. The problems started when one of the machines had a screen die, and then the whole game developed a ton of issues. This is before I started working on it.

I've been swapping parts back and forth to try to figure out where the problems lie. The ball trough on one died, and I replaced that. Now it's mostly working, except the hoop mechs. The following coils do not function:

The shooters for 2, 3, and 4. The defender mech seems to just go to the left and hang there.

If I flip in the other machines driver board, all, of the coils lock on.

If it was one or two, I'd think it was a transistor, but... It's like 8? Any ideas would be great.