Hi everyone. I am a still pretty much a novice when it comes to repairing my pinball machine. I am OK with swapping out parts and soldering, but not very good at understanding how to test things or to do board-level stuff.
Here's my story:
Last week we had company over and got into a marathon pinball series. All of a sudden the room smelled like burnt electrical parts. Inspection showed that my top right pop bumper coil got blazing hot and the plunger was stuck down. I powered off the machine and removed the coil. SG1-23 850DC. I went online and ordered a replacement (SG-23 850DC), which came with a new sleeve and resistor/diode? (I think it is a diode.) I cleaned and steel-wooled the plunger and reinstalled the assembly. After installation, the solenoid still does not work. I put the machine in diagnostic mode and all solenoids fire except that one. I have a feeling that something else must be wrong - perhaps on the driver board? I do not have any test equipment other than a cheap digital multimeter.
Firepower II and Black Knight share the same MPU and driver boards (Williams System 7 I believe).
Any advice on next steps?