I think if this is bad, a switching power supply is used to replace the board. This what I did on my Robotron. The PS was about $40 or so. This is where I kinda screwed up a bit and removed the whole power supply. After hooking everything back up, I blew the monitor since I eliminated the isolation transformer.
![darn](http://soda-machines.com/discussions/Smileys/smc/darn.gif)
I'll never do that again, so I can walk you through some of it if indeed its the problem.
I'm going to see a Pac-Man machine in a few days that is supposed to be non-working.. I'm getting kinda excited about a project.
![hopefull](http://soda-machines.com/discussions/Smileys/smc/hopefull.gif)