Quoted from EEE:I’m working through a second issue with a Gottlieb Genie that has a new Pascal PI-4 board.
The issue is that the ‘C’ segment of Player 1 & Player 2 & the Status display is locked on. I have read that this is typically related to a CPU problem with a bad Z16 chip (pin 11) but this chip doesn’t appear to be present on the Pascal board.
Has anyone with a Pascal All-in-1 board had this issue?
[quoted image]
I doubt it's the pascal board problem. I'd replace the crimp A1J2-5 that is directly tied to this segment on those 2 displays. Short of z16, which is not present on this board, it's the only common factor between the 2 displays and that segment. If that doesn't work I'd swap displays 1 and 3 and 2 and 4 and see if any of the issue moves. Problems with 1 display can often affect another.
This is a great diagram that ties segments and digits to individual pins https://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_1#Display_Data_Problems