Gottlieb system 1 help

slither

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Dec 15, 2009
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Ontario, Canada
Hey guys, been working on a system 1 solar ride. It was dead when I got it, replaced the power supply, with a new rottendog replacement, machine boots and plays, but getting random resets/shutdown,seems to happen mostly when the pop bumpers are activated quickly in succesion, 7 0r 8 times, shuts the machine right down, also the displays are all showing 777777, or -----, varies as high score flashes , I have swapped in 2 other sys 1 boards(with other issues) and the displays are fine, any ideas, I was thinking the z16, 17 chips, I think they are the top 2 on the right?. Any ideas are appreciated.thanks..
 
Do the slam switch mod and all the ground mods.

Has the cpu to driver board harness been either repinned or replaced with a new one yet?
 
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