Hi folks.

All my pop bumpers worked fine just a little off adjust so my middle was the worst I fixed that then the right was a little off so I was adjusting that with the power on (wont do that again)! I was using my em gap tool and i touched the contacts on the right bumper switch and heard a hum and blew f3 fuse. I replaced fuse and now the right pop bumper locks in. Not when i turn the machine on but only when I press the start button. I unhooked the leads to the activation switch and the switch that tells it it fired on the right pop bumper and it still locks on. I grounded transistor Q73 and it fires the right pop bumper so that tell me that's good. Do you think it could be chip u45? Any Ideas???

That's the small one right?

Would transistors only be the culprit when the machine is turned on and they lock. In my case the right pop bumper only locks up when I hit the start/cridt button?

bad 1n4003 on the power aux board. Thanks for the help?