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Monday 27 November 2017 at 03:05
You get an A+ on your homework!
good news. Z11-Z15 are fine.
And, I think that U4 is fine too.
Post a pic of connector J6 on the MPU (lower edge, left). Has someone used a Jamma connector there that may have slid? Is there any evidence that J6 has been repinned?
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Chris Hibler - CARGPB #31
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Source: http://pinside.com/pinball/forum/topic/black-hole-startup-issues#post-4093379