Have a Gottlieb Roller Disco Wide Body. System 1 with new driver board and power supply by RottenDog. CPU replaced with Pascal PI-1. Worked fine until we moved it 20 miles to its new home. Now if machine is nudged, random scoring of 10 points up to couple of hundred points (in 10 pt increments) will occur. Sometimes you get a chime (electronic sound generator replaced with re-built chime unit), sometimes you don't.
Have visually checked all switches and tested them while machine on, nothing seemed out of the ordinary.
I am a novice. The guy I bought the machine from has been more than helpful! He rebuilt the pin, and has spend hours trying to figure out what the issue is. At one point, he cut a wire to a switch, and that stopped the random scoring, but also stopped some normal scoring (and chimes).
So he reconnected it, and problem returned. Any suggestions on how to find the offending switch or what else might be the problem?
Pics below, one a close up of talked about wire (blue terminal), second a pic of entire board with close up pic area circled.
Also, pop bumpers function but don't sound chimes or score points. I have read they should score 100 points per 'pop'....