Quoted from tait316:I'm still not sure why there are occasional misboots but as long as I get it up with only a few power ons I'll be happy.
How does the misboot happen? Is it attempting to boot and then resetting?
Did you try flexing the piggyback daughterboard on the MPU? Very well known point of failure on those boards. Just pressing on it a bit in various places and wiggling it a little bit should help identify if that may be the issue or part of the issue. Cold solder joints on that board affect the ROM from being read correctly which can cause a lot of issues. You could try flexing the board some once the game does boot successfully. If it resets then there's probably a cold solder joint there.
If you do happen to have daughterboard issues or want to rule that out, I sell a plug-and-play fix for that (no soldering).
https://www.pinitech.com/products/gottlieb_piggydeux.php
