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Introduction

If your Lenovo Thinkpad X1 Carbon 4th Generation is giving a blue screen, restarting randomly, has a burning smell coming from the motherboard use this guide to replace the motherboard (also known as a Logic board).

The motherboard is the main part of the computer and if it fails may cause other parts to fail.

Before using this guide, inspect the ribbon cable connections for everything attached to the motherboard.

Before beginning, make sure to power off your computer completely and disconnect from any external power source.

  1. Unscrew the nine captive screws on the bottom cover of the laptop using a Phillips #1 screwdriver. The screws do not fully come out of the back cover, so there is no need for screw management.
    • Unscrew the nine captive screws on the bottom cover of the laptop using a Phillips #1 screwdriver.

    • The screws do not fully come out of the back cover, so there is no need for screw management.

  2. Lift the back cover up and off of the computer.
    • Lift the back cover up and off of the computer.

  3. Carefully lift the far end of the battery connector with an opening tool facing towards you. Remove the connector by pushing it forward and lifting. Remove the connector by pushing it forward and lifting.
    • Carefully lift the far end of the battery connector with an opening tool facing towards you.

    • Remove the connector by pushing it forward and lifting.

  4. Remove the central 5 mm screw with a Phillips #1 screwdriver. Remove the central 5 mm screw with a Phillips #1 screwdriver.
    • Remove the central 5 mm screw with a Phillips #1 screwdriver.

  5. Lift the battery up and out of the computer.
    • Lift the battery up and out of the computer.

  6. Peel back the plastic protective cover above the main battery section to expose the coin-cell's red and black wires. Peel back the plastic protective cover above the main battery section to expose the coin-cell's red and black wires.
    • Peel back the plastic protective cover above the main battery section to expose the coin-cell's red and black wires.

  7. Gently unplug the coin-cell wires from the connector by pulling horizontally away from the connector. Lift the coin cell out from the computer.
    • Gently unplug the coin-cell wires from the connector by pulling horizontally away from the connector.

    • Lift the coin cell out from the computer.

  8. Carefully unplug the speaker connector by pulling it towards you. Carefully unplug the speaker connector by pulling it towards you. Carefully unplug the speaker connector by pulling it towards you.
    • Carefully unplug the speaker connector by pulling it towards you.

  9. Remove the two 5 mm screws on each speaker with a Phillips #1 screwdriver. Remove the two 5 mm screws on each speaker with a Phillips #1 screwdriver.
    • Remove the two 5 mm screws on each speaker with a Phillips #1 screwdriver.

  10. Unweave the blue and white wires from underneath the plastic tabs connected to the battery. Unweave the blue and white wires from underneath the plastic tabs connected to the battery.
    • Unweave the blue and white wires from underneath the plastic tabs connected to the battery.

  11. Lift each speaker up and out from the computer.
    • Lift each speaker up and out from the computer.

  12. Remove the  protective film to the left of the fan assembly. Remove the  protective film to the left of the fan assembly.
    • Remove the protective film to the left of the fan assembly.

  13. Carefully disconnect the gray and black antenna connectors on the green wireless LAN card by lifting under the antennas with an opening tool. Carefully disconnect the gray and black antenna connectors on the green wireless LAN card by lifting under the antennas with an opening tool. Carefully disconnect the gray and black antenna connectors on the green wireless LAN card by lifting under the antennas with an opening tool.
    • Carefully disconnect the gray and black antenna connectors on the green wireless LAN card by lifting under the antennas with an opening tool.

  14. Remove the 2.5 mm screw holding the card in place with a Phillips #1 screwdriver.
    • Remove the 2.5 mm screw holding the card in place with a Phillips #1 screwdriver.

  15. Carefully slide the wireless card out of the slot by pulling it to the right. Carefully slide the wireless card out of the slot by pulling it to the right.
    • Carefully slide the wireless card out of the slot by pulling it to the right.

  16. Peel off the black protective film to the left of the fan. Peel off the black protective film to the left of the fan.
    • Peel off the black protective film to the left of the fan.

  17. Do not remove the four screws closest to the fan. They do not affect the fan assembly. Disconnect the antenna wires on green the wireless LAN card to the left of the fan. Disconnect the antenna wires on green the wireless LAN card to the left of the fan.
    • Do not remove the four screws closest to the fan. They do not affect the fan assembly.

    • Disconnect the antenna wires on green the wireless LAN card to the left of the fan.

  18. Lift up the hinge connector that is attached to the fan's ribbon cable. Carefully disconnect the cable by pulling outwards from the ribbon connector. Carefully disconnect the cable by pulling outwards from the ribbon connector.
    • Lift up the hinge connector that is attached to the fan's ribbon cable.

    • Carefully disconnect the cable by pulling outwards from the ribbon connector.

  19. Loosen the screws on the 'x' configuration of metal. These screws are held on to the metal 'x', so don't worry about them falling out. These screws are held on to the metal 'x', so don't worry about them falling out.
    • Loosen the screws on the 'x' configuration of metal.

    • These screws are held on to the metal 'x', so don't worry about them falling out.

  20. Lift the fan upwards from the board.
    • Lift the fan upwards from the board.

  21. It's best practice to replace the old thermal paste under the 'x' configuration of metal. (Guides on how to replace thermal paste can be found here.)
    • It's best practice to replace the old thermal paste under the 'x' configuration of metal. (Guides on how to replace thermal paste can be found here.)

  22. Using a Phillips #0 screwdriver, remove the two 5 mm screws securing the USB ports on the righthand side of the motherboard.
    • Using a Phillips #0 screwdriver, remove the two 5 mm screws securing the USB ports on the righthand side of the motherboard.

  23. The white triangle symbol on the motherboard identifies the longer 5mm length screws. Using a Phillips #0 screwdriver, remove the five 5mm screws.
    • The white triangle symbol on the motherboard identifies the longer 5mm length screws.

    • Using a Phillips #0 screwdriver, remove the five 5mm screws.

    • The white square symbol on the motherboard identifies 2mm length screws.

    • Using a Phillips #0 screwdriver, remove the four 2mm screws.

  24. Remove the 7 ribbon cables connecting the motherboard to their respective components by flipping up the locking black tabs with a spudger and pulling the cables from their connectors.
    • Remove the 7 ribbon cables connecting the motherboard to their respective components by flipping up the locking black tabs with a spudger and pulling the cables from their connectors.

    • Remove the red and blue wires attached to the motherboard.

  25. Using the plastic opening tool, gently lift up on the motherboard. If resistance is felt double check to make sure all the screws and ribbon cables are out.
    • Using the plastic opening tool, gently lift up on the motherboard.

    • If resistance is felt double check to make sure all the screws and ribbon cables are out.

    • Lift the motherboard out from the computer.

Conclusion

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

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