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I recently bought an NES (which I was told was fully functional) hoping to have some fun playing some games.

However after getting a cartridge (Mario bros & Duck hunt combo cartridge) the system flashed a blue screen and reset constantly. From what I knew this was because it was either really dirty or the 10nes chip had gone bad.

I thoroughly cleaned the system and cartridge which removed a lot of dirt however it still didn't want to function. The only plausible explanation was the 10nes chip so I followed various tutorials on disabling it by removing the 4th pin.

Unfortunately I accidentally damaged the 5th pin in the process, so in addition, is my NES even more dead than it already was now or is it still recoverable?

Side note: The 72-pin connector was cleaned too (it was not dirty at all) and all the pins were in good shape.

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  • Can you post a link to the tutorial(s) you used in your attempt to disable the 10NES chip? We might be able to point you to where these tutorials went wrong.
    – Zibbobz
    Commented Sep 2, 2014 at 14:55
  • @Zibbobz as far as I understood this, OP has accidentally severed pin 5 as well as pin 4 (which he meant to sever) and asks if it can be fixed
    – MrLemon
    Commented Sep 2, 2014 at 14:59
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    Apparently pin 5 isn't connected to anything, so you should be okay. Commented Sep 2, 2014 at 16:19

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If the screen is flashing once a second, the 10NES chip is still active and you did not pull the right pin. The flashing is the 10NES resetting the console.

If the screen is no longer flashing, then you have a different problem. As a comment mentioned, pin 5 of the 10NES is not actually connected to anything.

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