I have been working on a Bally Space invaders at home for the last couple of weeks. I have everything working now, except for the infinity lights. Only a few work and none of them "chase". In my quest to shotgun the repair... I found some burnt connectors at the power supply, so I replaced the power supply, as I didn't have a rebuild kit handy for a -49, but did have a new Voltage Regulator board.. I replaced the connectors and repinned them. That got me from NO infinity lights, to a few working in clumps. I had a Bally Aux lamp driver board rebuild kit from Big Daddy, so I replaced the chips on the Aux lamp driver. No change. I have tested that it isn't just burnt out bulbs.
I've never messed with a Bally aux lamp driver board before, so I am not sure where to start.