Blinking Screen

Problem: Blinking/Flashing Screen
Causes: Solutions:
1.Game Pak not inserted properly **Push game pak completely into control deck and press down
2.Dirty connectors **NES Cleaning Kit (buy at Funcoland!) needed to clean Control Deck and game pak edge connectors
Problem: Snowy Screens
Causes: Solutions:
1.Improper hookup to television **See product owners’ manual for hookup instructions
**If hookup is correct, visit your nearest Authorized Service Center for free product testing. Or call 1-800-255-3700 for assistance (and/or nintendo.com)
Problem: Scrambled Screen
Causes: Solutions:
1.Dirty connectors (usually happens with products beyond the warranty period or in cases where customers rent or borrow game paks that are not cleaned. **If cleaning does not solve the problem, visit your nearest Authorized Service Center for free product testing. Or call 1-800-255-3700 for assistance (and/or nintendo.com)
Problem: Solid Color Screens
Causes: Solutions:
1.Dirty connectors (usually happens with products beyond the warranty period or in cases where customers rent or borrow game paks that are not cleaned. **NES Cleaning Kit (buy at Funcoland!) needed to clean Control Deck and game pak edge connectors
2.If this symptom occurs with a new NES it may indicate improper hookup to the TV. This usually occurs when both the VHF input and audio/video input are connected. **If cleaning does not solve the problem, visit your nearest Authorized Service Center for free product testing. Or call 1-800-255-3700 for assistance (and/or nintendo.com)
**See product owner’ manual for hookup instructions
Problem: Blinking Power Light
Causes: Solutions:
1.Game pak not inserted properly. **Push game pak completely into control deck and press down
2.Dirty connectors. **NES Cleaning Kit (buy at Funcoland!) needed to clean Control Deck and game pak edge connectors
**If cleaning does not solve the problem, visit your nearest Authorized Service Center for free product testing. Or call 1-800-255-3700 for assistance (and/or nintendo.com)

*pictures scanned from Nintendo World Class Service Product Maintenance