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Wednesday 2 May 2018 at 03:02
Quoted from EMsInKC:If everything resets properly and you get the ball to the shooter lane, then check the adjustment and clean the trough switch, and also check and clean the ball count unit in the head.
The ball count unit was the issue, working now.
Thanks Howard for all your help!
Source: http://pinside.com/pinball/forum/topic/gottlieb-sky-jump-issues-after-sitting-8-years#post-4373821