I picked up a Space Invaders a couple of weeks ago that was in need of a lot of work. I've fixed a lot of the cosmetic work and LED'ed the whole game. My last big hurdle was tracking down why none of the solenoids were working. After I repin J3 on the solenoid driver/high voltage board I should be good to go. For now I'm running a temporary jumper wire between TP1 and TP3.

My problem now is that most of the switches don't work. I've tracked down a switch matrix and the ones that work are all over the place. Specifically 6, 9, 10 27, 28, 29, 30, 33, 34 and 35. It seems like most of the working switches are in the bottom of the playfield. I've found a couple of ceremic capacitors and diodes that were clipped on one of their legs and I've resoldered them. Is there anything else I should check?

#space-invaders

I didn’t check the capacitors and diodes before i resoldered them. My mistake since they looked fine and not burnt up.

Quick update. I was able to get most everything working by changing out almost all of the the connectors on A4J2. I still can't get a couple of things working, which are the left and two middle parts of switch 05 (50 point reb) and 26 (right extra small ball lane). Now if I can fix those two, I'll be in great shape.

Another update. I was able to get all of the 50 point reb switches (switch 05) working. By removing the switches and cleaning the contacts with a fiberglass eraser, they all started working again. Now to fix the left slingshot (the two switches work fine) and switch 26 (right extra small ball lane)...