I picked up a Spring Break at a reasonable price. I had it woeking 100% after adding the piggy deux card. I cleaned it up added LEDS and now I lost the upper right pop. Dead as doornail. Worked fine before the tear down. Here's what I've checked.
- swapped pop bumper boards. They all work, pop in question is dead on known working boards.
- switched wires on the coils. The coil works
- checked switch continuity, apron/switch is good.
-fuse under playfield was checked with a meter. It's good.
Where do the pops get their power on this system? Anyone else have this?
Manual is on its way. All ground mods are done cabinet and boards.

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Solved...this turned out to be stupidly simple. So the fuses under the playfield are wired incorrectly. The fuses for the UL pop and middle pop are reversed. I thought I was checking the middle pop fuse but in reality it was the UL pop which was good. I had no reason to check the fuse labeled Upper Left pop because I assumed it was working, but that's the one that was bad.
I found it by checking for voltage at the middle pop coil. Nothing. So checked for voltage at the fuse block. That's when I discovered the voltage stopped at the incorrectly labeled fuse. This drove me crazy for a day!

Thank you all for your input.