I have a 1982 Taito cab (jungle king/elevator action series) - was working fine then board froze so I checked the +5 and it was only 4.3 at board. Went to adjust the 2 +5 trim pots and snap - +5 led light went out and no more +5. Two questions - why is one pot marked +5I and the other +5 V and the other is any ideas on what might have snapped when i tried to adjust the +5v. Fuses are good and i still have +12 - I know I could just throw in a universal p/s but i was trying to keep the game original so if someone knows of a common failure i would like any info you might have.