I have a bally playboy that I just rebuilt the rectifier board, all new parts, pins and connectors, put it back in the game and when I first turn on the game the knocker solenoid pulls in and stays energized, I checked the solenoid driver board and all is good.

Any ideas on what the problem is.Inside BackBox.jpgRec-Finished.jpg

Ya know that was my first thought but I checked them all on-board and they checked good...... but maybe not, so I'll replace it regardless.

Problem still persist, since last post new solenoid driver, power supply, MPU, lamp driver, knocker coil and diode.

????????????