Saturday February 24, 2024

Gottlieb System 3 - Start Up Issue
  Posted by: AceBHound on Jun 6th, 2011 8:49 PM
Learned something new about Gottlieb System 3 pinball machines this weekend. Some of them stop booting properly due to the watchdog circuit becoming more sensitive over time. Here's a video I took of a Shaq Attaq with this issue. I did some research and some people have fixed this by replacing the 74HC123AN chip but many suggested updating the game rom software since this was an issue Gottlieb knew about so their later software updates helped fix the issue (guessing made the circuit less sensitive). The software in my machine was Revision 1... updated to Revision 5 and it boots fine all the time now.

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