We've actually got 2 N64's, one that works most of the time and one that barely worked so I decided to have a go at getting it back to working order. The actual fix was really easy, grab a bit of cloth and some metal polish and use a card (I used my provisional licence) to wedge it into the cartridge slot to clean the contact points. I wanted to go a step further though and actually make sure the whole console was clean. I also had issues with all of my controllers, particularly one that you needed to push so hard on it hurt your thumb and the other constantly turning left. Completely dismantled The nasty grime that needed cleaning off Inside the joystick pad before cleaning, all that powder is from wear and tear as the bottom of the joystick rubs against the plastic floor underneath, causing the joystick to drop and not function properly anymore. Same pad after cleaning and repair The piece of plastic I made to fit on the bottom of the joystick so it lifts it up and fixes the problem caused by wear and tear. Then on to cleaning the console.. This was the initial dirt I found inside... Fully dismantled and cleaned Putting it back together N64 Console and Controller now cleaned and fixed. The console now works with every game with no issues whatsoever, and the controller is lovely and smooth. Recently also cleaned up the Super Nintendo and Sega Megadrive too!