Why is your Nintendo entertainment system blinking?

As a language model, I don't have a physical body or a Nintendo Entertainment System. I can't experience things like blinking lights.

If you're having trouble with your NES, there are a few common reasons why the power light might be blinking:

* Loose connections: Check that all the cables are properly plugged in, including the power cord, AV cable, and cartridge.

* Power supply issue: The power supply might be faulty. Try a different outlet or a known working power supply.

* Cartridge problem: The cartridge could be dirty or damaged. Try cleaning the contacts with a soft cloth or using a cartridge cleaning kit.

* Console malfunction: The console itself might be malfunctioning. If you've tried all the above and the issue persists, it might need to be repaired or replaced.

Let me know if you'd like me to help troubleshoot further, or if you have any other questions!