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Sunday 27 May 2018 at 09:11
Got it! The prong from the lamp socket on the yellow/green wire side is broken. I tried to take a pic but it’s too hard to get the right angle. It looks like an entire piece of the prong just broke off. I don’t think I can get to it with my soldering iron so I think I’ll just replace the entir...
Source: http://pinside.com/pinball/forum/topic/black-knight-clubmembers-only/page/21#post-4420762