Nintendo Entertainment System Motherboard Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          20 - 30 minutes

Sections

Game Cartridge Tray
4 steps
Motherboard
3 steps

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Introduction

What you need

Step 1

              Game Cartridge Tray

Remove the six 13.25mm Phillips screws on the bottom of the game console with a #2.5 flathead screwdriver.
The screws are recessed about 40 mm.
Flip the game console right side up and take off the top by pulling it up and away from the rest of the device with your hands.

Remove the six 13.25mm Phillips screws on the bottom of the game console with a #2.5 flathead screwdriver.

The screws are recessed about 40 mm.

Flip the game console right side up and take off the top by pulling it up and away from the rest of the device with your hands.

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Step 2

Remove the seven 13.25mm Phillips screws from the metal cover with a Phillips head #2 screwdriver.
Remove the metal cover by pulling it up and away from the rest of the console with your hands.

Remove the seven 13.25mm Phillips screws from the metal cover with a Phillips head #2 screwdriver.

Remove the metal cover by pulling it up and away from the rest of the console with your hands.

Step 3

Remove the two silver 17.45mm Phillips screws from the cartridge tray using a Phillips head #2 screwdriver.
Remove the two bronze 13.25mm Phillips screws from the cartridge tray using a Phillips head #2 screwdriver.
Slide the cartridge tray toward you, away from the 72-PIN connector, and off the motherboard assembly.

Remove the two silver 17.45mm Phillips screws from the cartridge tray using a Phillips head #2 screwdriver.

Remove the two bronze 13.25mm Phillips screws from the cartridge tray using a Phillips head #2 screwdriver.

Slide the cartridge tray toward you, away from the 72-PIN connector, and off the motherboard assembly.

Step 4

Note: Underneath the cartridge tray is a black trapezoid-shaped tab/lip (see marker). When properly assembled this tab/lip goes below the motherboard and shielding as seen here.
During reassembly, make sure you orient this tab underneath the motherboard in addition to orienting the tray on top. Failure to do so will bow the cartridge tray and place stress on the component, causing the cartridge spring mechanism to bind.

Note: Underneath the cartridge tray is a black trapezoid-shaped tab/lip (see marker). When properly assembled this tab/lip goes below the motherboard and shielding as seen here.

During reassembly, make sure you orient this tab underneath the motherboard in addition to orienting the tray on top. Failure to do so will bow the cartridge tray and place stress on the component, causing the cartridge spring mechanism to bind.

Step 5

              Motherboard

Remove the three 13.25mm Phillips screws that secure the motherboard to the lower case with a Phillips head #2 screwdriver.
Pull the motherboard assembly straight up and out of the plastic case with your hands.
Turn the motherboard assembly over so the metal cover is facing you.

Remove the three 13.25mm Phillips screws that secure the motherboard to the lower case with a Phillips head #2 screwdriver.

Pull the motherboard assembly straight up and out of the plastic case with your hands.

Turn the motherboard assembly over so the metal cover is facing you.

Step 6

Disconnect the wire harnesses from the motherboard assembly:
Player 1
Player 2
Power
Make sure you remember where player 1 and player 2 cables are plugged in; do not mix them up. A good technique would be to write each title on a piece of tape and wrap them around the appropriate wire.

Disconnect the wire harnesses from the motherboard assembly:

Player 1

Player 2

Power

Make sure you remember where player 1 and player 2 cables are plugged in; do not mix them up. A good technique would be to write each title on a piece of tape and wrap them around the appropriate wire.

Step 7

Lift off the EMI shield (metal cover) from the motherboard assembly.
Turn over the motherboard assembly so the 72-PIN connector is on the top of the motherboard assembly.

Lift off the EMI shield (metal cover) from the motherboard assembly.

Turn over the motherboard assembly so the 72-PIN connector is on the top of the motherboard assembly.

To reassemble your device, follow these instructions in reverse order.

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                    nicholasweiser

Member since: 09/22/2010

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Team

                       Cal Poly, Team 14-40, Forte Fall 2010                        

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                                            19 Guides authored

Albert lopez - Nov 27, 2017

What do I do if my console doesn’t work at all I put a game in and the power light flashes on and off and or the screen stays on purple

Fritz Geib - Mar 29, 2020

Clean the 72-pin connector and cartridge pins

What do I do if my console doesn’t work at all the power light flashes on and off or it’ll stay on but the screen shows purple what could be the

Brede Basualdo - Dec 10, 2017

you need to change the cartridge connector (the one to the mainboard)

Jay - May 27, 2020

Hello can you tell me why my nes turns on but I don’t get any sound or picture of the tv.

Introduction#

What you need#

Team#

Introduction

What you need

Team