check voltages with flipper button pressed,should be 10 or so volts to hold  the flipper up,try another fliptronics board,sound like coil is getting hi voltage to hold flipper which will burn them out pretty quick 

Think he said it's pre-fliptronics? (like mine s/n:845041)

I am looking at one now...

Looking at the playfield raised up against the backbox:

RH Flipper coil wiring:

Top lug: Dark Blue with yellow dot.

Middle lug: Aqua to EOS switch and loop wire to capacitor.

Bottom Lug: Dark Blue with Purple dot.
                 Aqua to EOS & solid wire of capacitor.

S.