This one is bizarre.

ACDC premium, whenever the ball was on the lower PF the kicker would fire at all times not just when the ball was settled at the kicker.

We we replaced the opto sensors and you would think that did the trick but no.

I had an very good pinball technician come over he was stumped as well. He said everything physically is working correctly so maybe it’s software related. And he noticed I had pinball browser song modified but I had that for years and it was always fine. However I had been messing with the speech and music attenuation to get the sound levels better as well as other changes to default settings. The tech suggested I go back to default settings, still keeping the modified code. Anyway that did the trick.

Sadly I didn’t take note of what settings had been changed so I wasn’t able to re-check if there was a combination of settings that would make it recur or would be reproduced on a different machine.