I'm working on a Gorgar. I've never encountered such problems before so I'm stumped. Game plays. In attract mode both flippers are always active. Also, when pressing left flipper during attract or game play, speech triggers where you hear "Gorgar" every time you press the left flipper. Everything else in the game works such as solenoids, cpu controlled playfield lights.
Some trouble shooting already done:
female/male mpu and driver board interconnect already changed
power supply capacitors replaced
All transistors checked and found to be working properly
A three driver onboard 6821 PIA's changed and socketed
After changing all the aforementioned, no change. The mpu board I'm using is a System 3 converted to system 6. Conversion is fine. New program and flipper roms burned. Anyone have a suggestion? I'm curious as to what controls the flippers to stay on all the time. They should shut down.