get this wether the cart is plugged in or not, so not even the built in games work.
I got this screen before whenever i plugged in the family converter to the not disassmbled sj3 and tried to paly an NES game.. after several combinations of plugging nes cart into it and it into sj3 it eventually works
however i dont have the built in games disabled though i kinda screwed with one of the end pins for the soldered on memory bank containing the built in games, but it appears to stillbe connected. any ideas?