Before I throw in the towel and buy an after market Sys 1 power supply board, I thought I'd throw this out to the Great Pinball Gurus!
After I spent 6+/- hrs testing and replacing components I took my 2 boards w/ same problem to my board guy and we spent another 4 plus hrs duplicating some of my previous efforts, retesting and replacing more components. All to no avail, still 2.4v - 2.6v at the 5V pin(A2P2.) All input voltages(A2P1) are correct. Let's see if I can remember all replacements;
7 pin Connector(A2P1), CR1 & 2, CR 3 & 4, Q1, IC1, CR5, CR101 & 201, Pot R4, CR21, R21,LIC1, additionally C1 w/ supplemental grounding line added.
Additional info...., -12v good, 60v and 42v good on A2P3 , as expected 4v & 8v virtually nil.(can't remember exact)
My board guy has a good board/working machine(Joker Poker). Oddly and likely meaningless, both bad boards are off Genie.
Thoughts, suggestions, directions(even toward the fridge) are welcomed.