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Wednesday 16 May 2018 at 11:04
Quoted from Enaud:Have you checked the subway optos (left side and right side)? I had similar issues and found that those optos needed cleaning.
Quoted from Pin_Guy:The best way to troubleshoot opto problems is to remove all the balls and look at your switch edge test; any opto that is not closed ...
Source: http://pinside.com/pinball/forum/topic/sttng-owners-club/page/46#post-4400712