Today I recieved 12 NES games from a friend. I put one of them into my Nintendo and it showed the flashing red light. I wasn't concerned because i thought all they needed was a good cleaning. But then, after i cleaned all of them thouroughly, i still got the flashing light. Keep in mind, before i put my newly recieved games in my system, it had been working perfectly. And now, even the games i have owned forever don't work. In conclusion, my NES doesn't read any of my games anymore, and i tried playing them on my backup NES and got the same results.