Quoted from Furio:
Ok, does anyone have any idea what could be causing this issue. The Coin door is reading as open and it’s clearly not. (See pic 1) I am looking for something causing this issue around the coin door and see nothing out of place. Checked the wiring here and see no issues. I have seen a double set of connectors on the main board that are not connected. (See pic 2) Not sure what they go to or if they should be attached. I do have a burnt wire from a short related to shippping impact but that wire doesn’t go to the coin door, it’s orange with black stripe. (See pic 3) If anyone is decently good at trouble shooting and you have a few minutes, pm me for my phone number. Trying to at least get the game playable for Christmas.
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If you trace the cable from the "bottom" white switch where the coin door presses you should see a wire that runs back to a board. Here is the diagram from the owner's manual. The wire goes into the J604 plug on this board. Pin 6 specifically. Hope this helps, maybe a wire is loose inside the connector and isn't all the way in?
PS the manual is available on the jersey jack website under downloads. This page is D-80.