Have you ever thought about that nes that you've had in the closet for years. Well when you take out to play Mario for old time sake and It doesn't work. Well here is the instructable for you.
Step 1: The Easy Fix
All you need to do is wiggle the game around and if this doesn't work then read step 2.
Step 2: The Other Fix
Well if step one didn't work than you might need a new 72 pin connector.