Gorgar has been brought back to life! Rebuilt original boards, cleaned, new rubber, bulbs, all adjustments, and new aesthetics. After solving multiple overlapping problems, I'm left with one single issue. The "3" switch is dead. The manual shows it on the switch matrix and all switches on each side of it function. The DMM says it's closing and trace voltage mirrors adjoining switches. Is it possible that the driver or MPU have a bad component? Because the wires look good and I resoldered the one joint that looked weak. I even tried directly shorting the switch to see if it was some weird contact issue. Nothing. I've read up on pinball switches and other supporting articles I found but I'm not sure where to go from here. Any help would be appreciated. I'm thinking the next diagnostic I'll try is to bypass the actual wires with alligator clips to the previous switch in the chain to check for a possible voltage drop I'm not seeing.