How to: Repair an Original NES

Bru

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After a failed NES Classic search, my brother in law and I dug out his family's NES they've had for 30 years. It hadn't been plugged in for years, and back in the day this machine was heavily used.

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But now, it barely worked. The power light flashed, the screen flickered and games were sometimes playable but like 10 percent of the time. I researched common problems and a deep clean and massaging of the main cartridge connector seemed like a good start. I wanted to get this up and running while keeping it original - no cheap aftermarket replacement parts.

So the plan was:

-Raise the pins on the 72-pin connector to better contact the game cartridges (apparently they flatten and lose grasp on the game)
-Clean the connector's pins
-Clean each games' circuit pins
-Clean the motherboard terminals where the 72-pin connector attaches

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The inside of the NES was covered in dust but the shell was flawless and it looked pretty tidy inside. The pins on the 72-pin connector were definitely flattened. I took a small screwdriver and pulled them back up.

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And after removing, the motherboard circuit had a ton of what looked like oxidation - probably years of people blowing spit into the system.

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I cleaned the motherboard terminals and 72-pin connector with rubbing alcohol and brass polish. It cleaned them up nicely, but I had to go back and get more aggressive because the first time I put it back together it still didn't work.

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At the same time, I polished the game circuits on every game because I didn't want to use an old nasty game with the cleaned up connectors. All of the games were thrashed. A quick polish cleaned them up. I did have to buy a unique bit to open the games.

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And there you have it. The system works flawlessly now. Each game fires up first time, every time. I don't think it looks that bad on a newer TV.
 

IDAFC21

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Great work! We just set up my wife's old NES for my son. He loves it. Only problem with ours is the gun doesn't work for duck hunt. Any ideas?

If youre using a modern LCD screen, it wont work unfortunately. You need a good ol fashioned CRT. This vid does a good job of explaining how the light gun worked back in the day. Skip to abouuuttt 8:40 into the vid. The actual explanation is at about 13 minutes.

https://www.youtube.com/watch?v=Nu-Hoj4EIjU
 

Clayton Bigsby

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Very cool. I have mine in the box stuck back in the closet. The controllers suck and will wear blisters....I can remember bandaiding my left thumb like it was yesterday. My favorite games are double dragon, top gun, contra, Metroid and Mario bro's 1-3. The cheats were the most complex on the old Nintendo also.
 

Fish

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Btw, what's the retail on some of those games?

Rough estimate is about $250 just by glancing IMO.

I bought mine at the local flea market from a guy for about $5 a piece.

Where and when? The few times I went to flea markets, people were charging a premium for NES games. Ebay and beyond in some cases. I didnt wake my ass up early to go pay ebay prices.

I was given a NES with no cables, controllers, games or anything. Its a little beat up. Gonna use it as a raspberry pi case eventually. Willing to donate the innards to anyone if they want.
 
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