I recently purchased a count-down (Gottlieb system 1). I already have a Count-down that is working fine, but this one is in better cosmetic condition.
I could not get the newer one to work, so I took all the boards out of the existing functioning one along with the cables.
It seems the new count-down machine boots properly and the displays also seem to be working as they should.
However, none of the switches on the coin door work - I cannot add a credit, start a game or go into test service mode. The only thin I can do is reset the CPU (that works).
Does not appear to be the slam switch, but then again I am not an expert with these things.