First, I need to correct what I said earlier. I have both an Alltek MPU and Alltek SDU powering this pin. I have to assume that both of these relatively young boards are working correctly.
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Quoted from Barakawins1:
CottonM4 I meant were there any ceramic capacitors on the ball trough microswitches. If so, remove them. They are not needed.
There are none.
Check. It is gapped properly. It is not binding. All looks good.
Quoted from Barakawins1:
Third, remove the apron and roll each ball one at a time in the trough to ensure the switches are triggering properly
I have had the apron off more games than I can count. Manually manipulating all of the switches. I have triple-checked all my gaps. All are opening and closing correctly. All 4 micro switches are opening and closing correctly.
Here is what I have:
The 3 switches colored in green represent the 3 switches on the left side of the play field. The 2 switches highlighted in pink are the left saucer( Kick out hole) and the the micro switch that sits closest to the kick out hole.
switch (resized).jpg
With this pic below , the switches highlighted in blue represent the two micro switches and the outhole switch. If I have a ball loaded in to the kick out hole and manually push the first micro switch in the outhole lane I get the same behavior in that the pin thinks I have drained and it kicks out the next ball and bumps ball in play to #2.
switch_2 (resized).jpg
Without turning this explanation into a confusing morass, basically, when the kick out hole is activated, either one of the two other switches highlighted in pink act just the same and advance ball in play
All of the switches in question have the common yellow/red power wire. It may not be relevant but the Left Midlane switch connects to MPU A4-J2-13. And the Left outhole switch connects to MPU A4-J2-12. None of the other switches in the Y/R array behave like the 3 switches I have highlighted in pink. The ball shooter lane switch causes some funky action but will not advance me to the next ball in play. And I can press Advance Spinner To End switch and all it will do is keep scoring 7000 points; It will not cause a ball in play advance.
The short answer to all of this is that the Left Midlane switch acts like the Left outhole switch and makes the pin think a ball has drained.
This is my last hurdle to having this pin play like a million bucks.
At this point in time I am still scratching my head.