Gottlieb Monte Carlo System 80B MPU Daughter Card Replacement

Chris Hibler walks through a repair of a flaky Gottlieb Monte Carlo (System 80B) by replacing the OEM MPU daughter card with his own design based on Ed at Great Plains Electronics' work, installing McZong free play ROMs, a CR2032 battery holder, and a capacitor replacement. He then runs lamp, solenoid, and switch tests and confirms the machine is operational, noting an unfinished slam switch mod. The video is a single-machine repair walkthrough with no new-release or industry news.