Do you have the manual? One of the first few pages will list the startup sequence.

I could figure it out from the schematic, but there are too many things that happen during startup for me to list them all so I'll start with this:

I'm guessing that the AX relay coil with the Blue&Orange wire activates, but its coil with the Yellow&Black wire doesn't.
Also, the Player unit (bottom center in the backbox) probably isn't finding its way to its home position where the P5B switch opens.

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Here's the Pioneer startup page

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If pressing the Replay button doesn't activate the Replay Button relay (V), 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
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

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That step is for diagnosing a different problem than you have. So no need for you to actually do that.

If the 2nd Coin Chute switch doesn't activate the 2nd Chute relay (W), 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
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

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Check this switch on the Tilt Hold relay (H)

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

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One or more of these switches or relays is keeping the score motor running. Which one(s)?

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According to the schematic, the 00-90 relay (F) has 2 disks and no switches

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https://pinside.com/pinball/forum/topic/gottlieb-spirit-of-76-#post-5936878