It doesn't recognize a powerball. If working it just doesn't sense a steel one going by - from a couple days ago -

"Is switch #26 coming up in error ?

If so, this is the sensor at the end of the ball trough. Eddy sensor and a couple small boards. The tiny connectors are the issue. Reseat helps - or remove them and hard solder the board together to eliminate the problem."

In switch edge test see if the eddy sensor at the end of your ball trough is working. Errors or not.

LTG : )

I had switch 26 error come up, reseating worked..
but not until almost a day later. I figured I needed to solder but about 10 games later, the next day it started recognizing powerball 100% again.

Now, a month later, it misses the powerball < 5% since then, so I am leaving it till it worsens again...