Got a new pin yesterday, a Williams Big Guns. All was working fine, startup, switch test etc. Today on firing it up it is stuck in the adjustments menu. No pressing of coin door buttons seems to do anything. Game boots, and the ADJ menu scrolls furiously past on the displays, then resets.
Occasionally it will start into the music test mode, in which the start button works to scroll through music test choices.
I have checked connectors and all are secure.
CPU LED status lights are normal.
Coin door adjustment button presses do not register