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Sunday 24 December 2017 at 20:51
There is a gasket at the edge of the motherboard that will need to be re-attached to the new motherboard prior to installation. The motherboard is held down by 6 screws. Do not over tighten these. Just good and snug.
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Source: http://pinside.com/pinball/forum/topic/woz-dead-1#post-4140945