Just a follow up for future reference. I got my Games of Nevada game to boot. I was put in touch with someone who is familiar with the later model GON machines (thanks Badbaud). He said the symptoms indicated that the game was not booting from the eeprom. I sat down with a magnifying glass and looked at every trace to or from. There is one lead on an eeprom that, instead of a trace, has a single strand insulated wire going to a solder lug. It “appeared “ to be connected but upon closer inspection it was just the vinyl insulation melted to the solder joint. The single strand of wire had broken. I replaced the wire and the game booted. It had another problem where it would reset after a new deal but I sold the machine for cheap and walked away. I suspect the strand got stressed when the board flexed when being pulled out. Just coincidence that the vinyl was melted to the joint.