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Friday 11 May 2018 at 14:10
Quoted from woodmedic:... I installed a socket and a new 7400 at Z13. I also replaced the 7404 at Z11 which was already socketed. The game boots fine and sounds are working. Top half of the switches are still not registering. Looking at the diagram, other areas that could be bad are Z33, Z15, a...
Source: http://pinside.com/pinball/forum/topic/gottlieb-sys80b-switch-issues-after-short#post-4392025