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Thursday 31 May 2018 at 11:35
I’ve worked on many Stern and Bally games. If it don’t boot you count the flashes and that gives you a general idea of where the problem might be. On Williams it basically says to replace the CPU board or replace the driver board. I can’t seem to find any information on booting problems.
I’m...
Source: http://pinside.com/pinball/forum/topic/please-help-%e2%80%93-i-don%e2%80%99t-understand-williams-diagnostics#post-4427108