Hello, need some help on a switch matrix issue.
I powered off the game and proceeded to adjust the pops. I clearly didnt wait long enough as this blew the ULN2803. Luckily, it is socketed, so i replaced the ic chip and Fuse at F115. Switch matrix works and I can start a game, but have column out.
The column runs the pops, slings, and Left 3 target bank. Its associated with U20.13 -- which I believe is the ULN2803 I just replaced. They do not appear as closed in the switch matrix. Any ideas? Did I fry another chip?
I checked all fuses on Driver Board. I can fire all the associated solonoids in test, but no switches. Any ideas would be great help!