Quoted from Guinjasp:no game over and no match lights
Inspect and diagnose this circuit with Alligator clip jumper wires, especially the indicated switch on the Game Over relay and the wiper disk on the Ball Count unit.
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features