Quoted from Bax1:
So got some strange stuff happening with lah. So all of a sudden the high power on my left flipper died. It would slowly go up and stop at the end. I did do a flipper rebuild and prev owner did not have eos hooked up. Now fresh ones are installed and properly gapped. Led light does not come on in the flipping board. All fuses are good. Noticed the windings on the coil were loose so replaced. Since replacing the coil I have nothing. Have 6v if I remember right when button is pressed. Pulled flipper board and used a pulser and logic probe. Signal is getting from one end to the other so assuming no dead shorts. Need you data east gurus for some advice on where to go. Mpu?
Test the ohms on the EOS switch contacts. I bet it will be more than 2 ohms and has some coating on the contacts so clean with a business card and make sure the long blade pushes the short blade when the flipper comes back to rest.
Push on the EOS switch and then the flipper button. If It fires, definitely EOS switch issue.