Quoted from fredsmythson:
When the reset process stops, the lights on the playfield and backglass turn off? If the machine turns off during the reset process, most likely there is a faulty coil in a circuit that is related to the start up process. Visually inspect the machine for any burned coils and solenoids...
Everything seems OK on a visual inspection. I did find some wires had come off of some switches on the score motor. I resoldered them (so much fun!) and nothing has changed.
Quoted from MarkG:
The reset position of the 100,000 unit is called the -1 position. At the start of a new game the 100,000 unit reset coil fires and its wiper disk unwinds to its -1 or reset position. The 10,000 unit should then advance (not reset) until it reaches its zero position. Once the 10,000 unit is back at zero the 100,000 unit takes a single step to its zero position and the game should be good to go
When I got the game there was a switch that was bent on the Start relay that just kept the score motor turning. I jumpered the switch so the score motor would keep turning and the 10,000 unit did advance to 0, and then the 100,000 unit steps up. This makes me think that the 100,000 unit is in the correct -1 position.
Quoted from MarkG:
During the reset sequence, a normally open (NO) switch on the U relay should close allowing pulses from a NO score motor 1A switch to get to the "Add 10,000 unit" coil. Since the U relay is firing, I'd check the NO switch on the U relay (slate-red to black-red wires) and make sure it's working properly.
U relay seems fine and switches open and close as they should. No wires of that color, but because of my jumper experiment I feel that this has been eliminated from the troubleshooting for now. I will keep poking around on this thing today.
Thanks for the help so far!