Hello,
I have a Williams Comet in good shape. The power supply has no burn marks or any of the usual scorched connectors.

Solenoids stopped working and I found the the 2.5A slowblo fuse was out. Replaced with a new fuse from mouser a few days later and all is good in the solenoid department. The games starts, plays, and scores just fine, however many of the lights are on that SHOULD be off. For example, the special light on the right hand ball return is on, the 2x and 5x bonus lights are on and the 9 and 6 lights of the 1986 are lit and should not be. I am not an experienced pinball tech, but I suspect something like a diode in the lighting matrix or something, but I really have no clue or any idea where to start. I have made this video demonstrating the issue:

and help would be much appreciated.