Quoted from ccgoudie:Normally you'd just push the Replay Button a
second time and that would engage the 2nd player, but nothing happens on my machine when I do that
If the Replay button doesn't activate the Replay relay, Inspect and diagnose this circuit with Alligator clip jumper wires
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Be careful, this is a 110 volt circuit.