Yesterday I got the Paperboy up and running. I swapped out the power brick for a cleaner one - this way I didn't have to repin the bad connector that caused the power shut down. After spending plenty of time troubleshooting and memorizing schematics, I narrowed my immediate problem down to a lack of +5 at the video pcb. I verified the switcher was rated for 12A, and then bypassed the ARIII and fed +5V directly to the video board from the switcher. The game powered up, and after a test mode and tuning the monitor, I have a perfectly playing paperboy! The way my repair luck has been going, I was almost sure adding the +5 would greet me with a whole slew of new issues with the boards. What a relief! The best part - I haven't had to spend a penny on parts for Paperboy.
This has turned out to be my wife's grail game. I could hardly keep her off of it yesterday.
Badlands update: still waiting on the new pcb. The ebay guy just shipped it today. I did get in a pile of power supplies to replace the dead one. The monitor is still dead, even though I thought I had narrowed the problem down to a visibly bad capacitor in the HV shutdown circuit. I have to order a rebuild kit.
Outrun update: I got in the new B gear and installed it. The steering mechanism is 100% now. I pulled a pot from a Champ Sprint pedal assembly, but it turns out the atari pots have slightly larger diameter shaft than the outrun pot. Darnit!! Luckily, an awesome member at KLOV is hooking me up with a complete outrun pot assembly. I'll have this game up and running as soon as the pot comes in.