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On the nintendo nes circuit board you suggested cutting the 4th pin on the chip 3193A. how do you know which is the 4th pin? There are 16 pins.

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Solid yellow screen that is not flashing. I replaced my 72 pin connector and made my nes region free (4th pin from the left on the nintendo chip). I can play Super Mario/Duck Hunt but every other...

Well I think that the capacitors might be broken then and need to be replaced. Or try cleaning the gamepacks out with qutips and rubbing alcohal.

Sep 21, 2011 | Nintendo NES Console

2 Answers

The red light flashes on my NES and on the TV screen, it keeps on changing colors. Do you know whats wrong?

The NES is touchy like that, sadly-- your problem isn't uncommon. My NES, and the NES of nearly every friend I have who still owns one, plays this little trick on them from time to time. Here's what we do:

1. Turn off the NES console.
2. Blow into bottom of the game, near the chip that connects to the NES.
3. Wipe away any excess dust from the game itself.
4. Blow into the console of the NES.
5. Wipe away any excess dust.
6. Re-insert the game and try again.

If this doesn't work, try placing the game in more delicately, or with more force. It's just a matter of trial and error, and sometimes it will work faster than others. Hope this helped!

Mar 12, 2011 | Nintendo NES Console

1 Answer

Hi, I have a Nintendo Entertainment System which I found laying around a couple weeks ago. It wouldn't work at first so I replaced the 72-pin connector. It worked perfectly until recently, when I turn the...

It is probably a bad chip on the main board.I used to work at United Radio in Syracuse,NY on Nintendos and would see that.I forget what the charge is to repair an NES,maybe $40?There should be a sticker on your console with the phone number to Nintendo to ask them about it,or you can google Nintendo to talk to them.If you send everything,they will replace the controllers,replace the board,and clean the games.It's up to you to determine if it's worth it.When I was younger,we used to take and cut a slim piece of paper,about 1/8-1/4" thick and put it over the pins and stick in the game.On Mario,it used to show you where all the hidden stuff was,if you got the right spot.Good luck!

Jul 19, 2010 | Nintendo NES Console

1 Answer

I am having issues with all of my nes games. I just put in a new 72 pin connector and I am still having issues. Before I purchased the new pin connector I also disabled the lockout chip, thinking that was...

Well the problem might be with the ppu chip inside of the console the picture processing unit chip has gone bad then. Try cleaning the game packs out with quips and rubbing alcohol or maybe it's a faulty pin connected that you have purchased then for the PPU chip it needs to be replaced.

May 23, 2010 | Nintendo NES Console

1 Answer

I replaced the 72 pin connector in my Nintendo Nes and now I just get a grey screen? what can bee the problem? Cecilia

You may have damaged something on the board during the process. I suggest going over what you did, making sure the 72 pin connector is seated properly so the connection can be made cleanly, and if all else fails snag another one on ebay and try again...

Nov 26, 2008 | Nintendo NES Console

1 Answer

NES console - white or green tv screen

first off flip your nes upside down and remove the screws to the cover of nes..... then flip your nintendo over and remove the cover.... remember you just voided your warranty for your nes..... then proceed to do the following:

find Chip 3193A and find the 4th pin on the left hand side near the blue coils. Remove or pull back the pin and your NES Will play Pal and NTCS games.

Sep 17, 2008 | Nintendo NES Console

1 Answer


you should open your nes and disable the regional lockout chip.
a911e61.jpg while in there, check the connector and 1) if it is new, make sure it is properly connected to the board, or 2)if its old, use a very small eyeglasses flathead screwdriver to pull pins closer in (1mm-2mm) to a uniform level.

Aug 16, 2008 | Video Game Consoles & Games

2 Answers

I have an old Nintendo nes and the power button keeps blinking on and off.

Okay, the blinking is not fixed by a new 72-pin; thats a common misconception. You need to disable your NES lock-out chip, its the reason games blink. Cut the 4th pin on your NES chip under the motherboard, its called "3193A". Do it at your own risk, if your remove it correctly the NES will work perfectly and never blink ever again.

Dec 10, 2007 | Video Game Consoles & Games

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