Elvira and the party monsters.

Lower pop bumper quit working. I found a burned transistor at Q77. Replaced it, no difference. I tested the transistor, it reads the same as all the others. I tested the traces and all the way back to the coil and it has continuity. There is power at the coil, and if I ground the coil it fires. The switch registers.

I'm at a loss, any suggestions?

"Anything the other direction" is what worries me. I'm working above my pay grade already lol.

UPDATE: I replaced the main board with a new RD board. After replacement, the lower pop fired on the first game, then locked on. It burned the transistor Q77 on the new board. I could not find any shorts in the wiring, and even though the coil tested OK and worked normally, I replaced it anyway with a new one. I replaced the transistor at Q77 and boom, all is good now. Elvira is a finicky bitch at times, but so much fun to play with!