Before you go to all of that trouble try brass polish on those connectors first. You can find tutorials online, but it's basically a deeper cleanse with Q-tips than rubbing alcohol. I've had plenty of games that I first tried RA on first and they didn't work, but did after I used polish.
Thank you! I tried this on Goldeneye and it worked!
I got an N64, Mario Party, Super Mario 64, Star Fox 64, Donkey Kong 64, Zelda: Ocarina of Time and Goldeneye for $10. Now that I know I can fix the games, I can honestly say that was a good deal.