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Nikon D40 Mainboard Replacement

Introduction

The mainboard controls all of the software on the Nikon D40. A faulty mainboard can cause problems that will require a new board. This guide will show you how to replace the camera's mainboard.

What you need

  1. Nikon D40 Mainboard Replacement, Back Cover: step 1, image 1 of 1

    • Remove the two visible 6.0 mm Philips #0 screws on the left and right sides of the viewfinder. These screws are highlighted in red.

    Edit

  2. Nikon D40 Mainboard Replacement: step 2, image 1 of 2 Nikon D40 Mainboard Replacement: step 2, image 2 of 2

    • Remove the four 6.0 mm Philips #0 screws on the left and right sides of the camera.

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  3. Nikon D40 Mainboard Replacement: step 3, image 1 of 1

    • Remove the four highlighted 3.0 mm Philips #0 screws on the bottom of the camera.

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  5. Nikon D40 Mainboard Replacement: step 4, image 1 of 1

    • While pulling the bottom down, remove the back of the camera.

    • Be careful not to pull too hard on the back as it is connected via a ribbon cable. Be sure to disconnect this cable on the main board.

    • To disconnect the ribbon cable pull the small black tab upward and pull gently on the cable.

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  6. Nikon D40 Mainboard Replacement, Mainboard: step 5, image 1 of 2 Nikon D40 Mainboard Replacement, Mainboard: step 5, image 2 of 2

    • Remove the solder connecting the red wire to the mainboard.

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  7. Nikon D40 Mainboard Replacement: step 6, image 1 of 1

    • Desolder the 4 smaller wires near the bottom of the mainboard.

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  8. Nikon D40 Mainboard Replacement: step 7, image 1 of 2 Nikon D40 Mainboard Replacement: step 7, image 2 of 2

    • Use the plastic opening tool to release the ribbon cables attached to the mainboard.

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  9. Nikon D40 Mainboard Replacement: step 8, image 1 of 1

    • Remove the five 3.0mm Philips #1 screws holding the mainboard down.

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  10. Nikon D40 Mainboard Replacement: step 9, image 1 of 2 Nikon D40 Mainboard Replacement: step 9, image 2 of 2

    • Lift the mainboard up to reveal the final connection.

    • Carefully detach the white cable from the board.

    Edit
Conclusion

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

7 other people completed this guide.

Author

with 2 other contributors

Joe Leija

Member since: 01/21/14

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2 Guides authored

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Team

Cal Poly, Team 6-19, Maness Winter 2014 Member of Cal Poly, Team 6-19, Maness Winter 2014

CPSU-MANESS-W14S6G19

4 Members

7 Guides authored

3 Guide Comments

What is the ordering of the small wires on the bottom? It is hard to put back together from the photos. Thanks!

Joseph Ruskiewicz - Reply

wheres the power source? i mean the fuse

Gringo Maputi - Reply

in the main board located kindly put markings on it

Gringo Maputi - Reply

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