Time to do some reading.
http://www.pinrepair.com/em/index3.htm#start
This link will take you to the start sequence section of the Pinrepair website.
It's a valuable, step by step, explanation of the start up sequence for EM Pinball machines.
Now, in order to help this particular problem, please provide a little more detail.
When you press the start button, does the motor run at all?
If it does run, does it run continuously?
One thing to check is the interlocking relay. My Atlantis had a problem starting the score reset sequence due to the interlocking relay (1st relay on the left bank of relays) not properly working. You may want to check this first to see if it pulling in properly.
Marcus