Fixed!!!
I was having the same problem today. I got a 64 from Craigslist and it wasnt working. Tried 3 tvs (2 hdtv's & 1 analog) using the red/white/yellow cord. The red light was coming on the system but the tv screen was totally blank. But turns out all I had to do was rub Isopropyl Alcohol inside the game (007 Goldeneye) w a Qtip and put it back in and it worked! It worked on the analog and Vizio 32" hdtv. Looked better in HD. I got a good amountof black and green out of the game.