-   i have a problem with my nes too, when im half way through a game, it doesnt matter which one my nes strats making a sort of beeping noise and flashing out of colour into black and white i can still carry on playing the game but it is really annoying haveing it flash and listening to the beeping sound. it doesnt stop till i turn the nes off
It's as simple as unscrewing the console by removing all the screws from the bottom. Once inside take off the metal piece over the area where the game is inserted. Once under there you can remove the two screws that hold the 72 pin connector in and pull it out and slip a new one in. Put it back together in reverse.