This may or may not be helpful, but I just got the chaser lights working on my SI this weekend after a lot of repinning and such. It was actually some DeoxIT on the block connectors that finally sorted out the few missing chase lights I had.

This is absolutely correct. In my case I put some deoxit in while trying to figure out my own weird gremlins and found that it was that particular connector that was the reason for all my ghosts. I ordered all new connectors and pins from Great Plains and repinned everything over the weekend and now my SI is finished.

As for the OP it really sounds like a combination of switch and wiring issues. Having just finished chasing the ghosts out of my own machine I don’t envy him. However, I am willing to make myself available for video chat or a phone call if I can be of any assistance. I know I could have used the help lol. PM me if I can be of any assistance.

Yes, I ended up replacing every single connector and pin, it took so many hours lol. But it did fix quite a few very odd problems I was having.

I got my Space Invaders in May and it was just like yours, nothing at all worked. I spent 6 months just getting it to come back to life. If you get frustrated please take a break and come back to it. There’s a lot to learn and you will spend many hours chasing gremlins (like you are doing now with the wiring). There is still all the play field issues to deal with once you get it working.

You are doing good work here restoring a classic, have patience and most importantly enjoy the process. If you aren’t enjoying it, take a break and come back when it’s fun again.

Just some hard-earned advice.