Nikon D40 Mainboard Replacement

  • Step 1 Back Cover

    • 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.

  • Step 2

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

  • Step 3

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

    Worth mentioning, the top circled screw was a 6mm on my camera. The other 3 were 3mm.

  • Step 4

    • 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.

  • Step 5 Mainboard

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

  • Step 6

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

  • Step 7

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

  • Step 8

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

  • Step 9

    • Lift the mainboard up to reveal the final connection.

    • Carefully detach the white cable from the board.