Has someone installed an NVRAM on the MPU board? That would explain the lack of "Factory Settings Restored".
Regarding the coin door buttons...
http://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_80
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Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info