Hi, I have a Nintendo Super System motherboard that I'm planning to sell. Unfortunately, I don't have any game boards to go with it, so I'm having trouble testing it. When I plug it into a JAMMA arcade connection and power it on, I get a black screen with the message "Non Slot". I figure that this is an indication that it's probably working fine (since I assume it's telling me that I don't have any games plugged in), but I was wondering if anyone out there could confirm whether or not this is normal? Thanks!