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Wednesday 25 April 2018 at 06:29
Quoted from cody_chunn:cracked solder joints.
+1 for cracked solder joint
If you are not sure what they look like, zoom in on the board pictured in this post:
https://pinside.com/pinball/forum/topic/polishing-up-a-silverball-mania/page/8#post-4227422
Reflow ALL of them not just any that are obviousl...
Source: http://pinside.com/pinball/forum/topic/future-spa-erroneous-displays#post-4359660