Tech Myth: Blowing Nintendo Cartridges Fixes Flashing Problem

If you were a child of the 80s, you most likely grew up with cartridge based video game consoles like the Nintendo Entertainment System (NES). Everybody had an NES back then, and like everybody else, they eventually experienced the same “flashing” problem with the console.

After about a year or two of use, the NES often exhibited a problem where it wouldn’t read game cartridges properly. Gamers would slide the cartridge in, then power it on only to see a flashing screen on their TV. To fix this, gamers would eject the cartridge and blow furiously along the bottom connectors of the cartridge and try again. This would be repeated until the game finally worked.

While the practice of blowing NES cartridges is widely accepted as “the fix” for the flashing problem, it actually has nothing to do with the problem at all. Blowing into the cartridges doesn’t fix anything. I mean, seriously! How much dust did you think actually got into your game cartridges? Unless you stored your video games in a coal mine, they likely didn’t have enough dust trapped onto the connectors to cause a problem.

So what really causes the flashing issue?

Any cartridge gaming system (not just the NES) has a ZIF connector. This connector is what comes into contact with the contacts on the gaming cartridge when you insert it into the system. After frequent use, the ZIF connector becomes deformed and the pins bend. The result is that an inserted video game doesn’t make proper contact with the ZIF connector and the console displays a flashing screen. Blow all you like, it’s never going to fix the problem.

The problem was so common that Nintendo addressed this issue by redesigning the NES where the cartridge would be inserted into the top of the unit rather than the side. This allowed for better contact with the ZIF connector.

So why did everybody think blowing into the cartridge fixed this problem?

It’s just how the brain works. You blew into the cartridge every time you inserted the game. When it worked, you automatically thought it must be because all of the blowing cleared dust from the cartridge. What really happened is you simply realigned the cartridge in a manner that made better contact with the ZIF connector.

I should also mention that there was an entire industry that convinced us that dirty cartridges were a problem. Whenever you went to places like Funcoland to purchase a game, the salesman would often display game cleaning products front-and-center. Who didn’t purchase one of these expensive cleaning kits?

NES Cleaning Kit

What really fixes the flashing problem?

You can still purchase a new ZIF connector for your old NES system from various sources such as Ebay or Amazon. They are incredibly easy to install. If you have some time on your hands, you could also manually bend the pins back into place. Personally, I opted to replace the ZIF. They are cheap and it took about 10 minutes.


So don’t waste your breath if you’re still trying to get that NES game cartridge to function. No need to clean the connectors or use expensive products to make your old system work better. Just make sure your cartridge is making contact proper contact and you’re good to go. Happy gaming!


  1. cratrige blower says

    Meh, i didnt play on those consoles but i did grow up with the newer gameboy colors
    andsome games wouldnt load a few times, this was partially as to how the mini cartriges was stored

    i didnt have to blow that much either. some dust came out and the game worked just fine
    i dont know about the 80’s gamers but in my case it was no “Myth”
    it worked. it didnt work when i tried without blowing, case closed

    and nothing you say/do wil ever change that fact

  2. maggies thatch says

    if this is the case…. wouldnt some moisture within the cartridge make a connection with the ZIF?

    i was having an email problem with my htc one the other day… i blew on it… didnt work

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