I opened up my sttng to replace a light bulb. This was apparently a huge mistake!

As soon as I restarted the game the solenoid (sol 11) in the trough fired, and refired. This is immediate. I do not even have a chance to start a game. It behaves as if I am doing a solenoid test.

I tried resoldering the coil, but that did not help. As far as I can tell the Violet Orange wire goes to multiple coils, and those are all fine. The brown orange wire comes from J 127, and does not attach to anything else. I unplugged and reconnected J 127 connector. No change.

My unfortunate realization at this point is that it may be the Q54 transistor? Am I missing something? I have not done board work before. I was sure I would find a loose wire shorting somewhere since everything was working 100% about 30 min ago.

Thanks in advance!

It keeps firing. It fires as soon as the game turns on and keeps going. It happens when there are 0 balls in the game, or all 6. I thought if it was an opto problem it would at least do a ball search or wait until I hit start.

I will go through the switch tests.

Thanks