1st check the voltage at the coil with a meter. The power side (usually yellow wire) should be +/- 43 VDC with black lead to ground. 2nd check the cabinet switch, set the meter to continuity and attach leads to the two tabs on the flipper button switch. If it beeps when you push the flipper button it's good. 3rd, did you install a new EOS (end of stroke) switch? Report back.