Concentrate on the eos switches at the left two flipper mechs.

Make sure they are making solid contact. Both of them. You can jumper them closed with an alligator clip and flip them really quick to test.

Did they work before replacing the boards?

The double switch is what drives both flippers if it’s like early sterns with double flippers. Be absolutely certain that is working right. Jumper it shut or hook a meter to it and make sure it’s getting consistent continuity when closed.

Awesome! Glad to hear that worked. Yeah since everything else is new, I say replace that switch too. But you really only need to replace the EOS part.

Here’s a link.

https://www.pinballlife.com/bally-end-of-stroke-switch-normally-closed.html