With a little patience, you can repair your NES and games to a like-new condition. This guide will help you disassemble your console and show you the areas you need to focus on when cleaning and repairing your Nintendo NES. No electronics skills are needed to follow this guide. The only caution I would advise is to take it slow and make sure not to pull too hard on PCB boards or connector wires.
Looking for a detailed walkthrough on cleaning your NES Cartridges?
Step 2: NES System Repair Tools
Step 3: NES System Console Disassembly
Step 4: Remove NES System RF Shield
Step 5: Remove the Nintendo NES System Motherboard
Step 6: Remove the NES Controller and Reset Button Connectors
Step 7: Remove the Old NES 72 Pin Connector from the NES Motherboard
Step 8: Cleaning the NES Motherboard Contacts
Step 9: Replacing the Nintendo NES 72 Pin Connector
Still not having luck playing your favorite game? Remember, your NES cartridges need to be cleaned as well!