Had a look at the schematic download from PBD. From what I can see from your picture, it looks to be the reset motor you have highlighted which continues to run on power up. Seems to be a contact not opening. Start with the game over relay. Follow the (orange with green tracer) wire thru the contacts. One at a time work thru the schematics and follow wire colours to contacts associated with the reset motor.

Regards

GT