whoa! i mentioned my nes messing up simply because people brought it as a favorite. i wasn't expecting any help, lol. let me explain exactly what's happening: at first i thought their was no hope, but i cleaned out the game(s) i wanted to play and after repeatedly and annoyingly blowing into the cartridge and positioning the game in numerous positions, i got it to kind of work. this brought back memories of why i used to hate this system.
but eventually, i got it to work, but when i play it for around 2, 3 hours flashing lines start to appear on the screen and the game is more difficult to see. shortly after that, the game will reset or my man will get stuckin like the middle of a mountain, no way to escape.
i don't know what a 72-pin connector is.
as for the blank screen, that always appears, but i manage to take that away by adjusting the way in which the video game is positioned.