If the Ball Count Unit Stepup solenoid doesn't activate when the ball drains on a 1 player game, Inspect and diagnose this circuit with Alligator clip jumper wires
Starting with the Coin Unit wiper and rivets
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features

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If the Player Reset relay doesn't activate when the Ball Count Unit reset solenoid activates, check the end-of-stroke switch on the Ball Count unit.

For a switch to work 3 things are necessary:
1) When open, there should be a small space between the contact points (duh)
2) When closing, the long blade's contact point should push the short blade's contact point enough to move the short blade
3) The contact points should be clean, which they usually will be if #2 is happening