OP

Quoted from grantopia:

I have, I'd really like to understand what the issue I'm having is before I just shotgun the whole thing. It has been completely fine up to last night so I doubt everything just failed at once (although can't rule that out in pinball ha). Ideally I'd like to see if I can narrow down the issue to the root cause and go from there. His guide is what got me thinking about starting with the power supply rebuild and the related connectors that zacaj mentioned above. I'll poke around there and see what I can find and go from there.

OP

Quoted from grantopia:

Thanks! I realized I never closed the loop on this. I reflowed all header solder on the power supply and replaced the headers on the power supply and mpu that correlate to the 5v (sorry it's been a few days and I'm not home typing this so I forget which ones exactly) and the issue seems to have cleared up!