Will work fine for days and just out of the blue the game will 'power down' and reboot during a game.

I have recapped the power supply, and looking for other suggestions.

@LTG - thanks, but have already gone through the checks listed. Figured I would at least start with the caps as they are old.

@Muppet_Man - thanks for the input. Didn't replace the rectifier (doesn't really make sense to me), but will add it to the list for the future parts order (suppose it can't hurt).

Thanks - this was my original thought as well. I ran a separate circuit for my Fish Tales and another pinball so they were not sharing with the video games. Didn't solve anything, although I will admit that I am not monitoring the line voltage as it happens ever so intermittently (could go a month or 2 without a reset or it has happened once 3 times in the same day - mostly it will go weeks). Doesn't mean that there is still a voltage drop once in a while.

I did pull the board today and removed the old solder from all the connectors and rectifiers and put on some fresh solder (vs. just touching it up like the last time). Works like a champ, but then it was really intermittent before and mostly worked I so can't say that it is fixed 100%. Will have to see how it goes over the next few weeks/months.

Thanks for all the suggestions though, will see how it all goes.