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What you need

    • User your fingernail to pull the small metal pin on each wrist band towards the inside. This unlocks the wrist bands from the body of the watch.

    • Remove the wrist bands.

  1. Huawei Watch 3 Motherboard Replacement, Remove the four Torx screws: step 2, image 1 of 1
    • Use a Torx T3 screwdriver to remove the four 4 mm-long screws on the back of the Huawei Watch 3.

  2. Huawei Watch 3 Motherboard Replacement, Pry the back cover open: step 3, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Pry the back cover open: step 3, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Pry the back cover open: step 3, image 3 of 3
    • Locate the small notch at the top of the back cover.

    • Use a Jimmy to pry open the back cover by twisting it.

    • Using a sharp metal tool might cause cosmetic damage to the watch case. Covering the tool with a nitril glove can minimize the damage.

    • Don’t remove the back cover just yet. It is still connected to the motherboard with a flex cable.

  3. Huawei Watch 3 Motherboard Replacement, Loosen the back cover gasket: step 4, image 1 of 2 Huawei Watch 3 Motherboard Replacement, Loosen the back cover gasket: step 4, image 2 of 2
    • Insert the tip of an opening pick between the back cover and the case.

    • Slide the opening pick around the back cover to loosen the gasket from the back cover.

  4. Huawei Watch 3 Motherboard Replacement, Lift the back cover: step 5, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Lift the back cover: step 5, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Lift the back cover: step 5, image 3 of 3
    • There is a ribbon cable running from the back cover to the motherboard.

    • Use an opening pick or your fingers to carefully lift the back cover open.

    • Flip the back cover open away from the crown.

    • You can prop up the back cover to minimize the stress on the ribbon cable.

  5. Huawei Watch 3 Motherboard Replacement, Remove the battery bracket screw: step 6, image 1 of 1
    • Use a Phillips screwdriver to remove the 2.9 mm-long screw from the battery bracket.

  6. Huawei Watch 3 Motherboard Replacement, Remove the battery bracket: step 7, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Remove the battery bracket: step 7, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Remove the battery bracket: step 7, image 3 of 3
    • User a pair of tweezers to lift the top of the battery bracket free from its screw socket.

    • Unhook the opposite side of the bracket and remove it.

  7. Huawei Watch 3 Motherboard Replacement, Unplug the battery connector: step 8, image 1 of 2 Huawei Watch 3 Motherboard Replacement, Unplug the battery connector: step 8, image 2 of 2
    • Use the tip of a spudger to pry up and disconnect the battery connector.

    • The battery connector is the smallest of the three connectors.

  8. Huawei Watch 3 Motherboard Replacement, Remove the sensor bracket screw: step 9, image 1 of 1
    • Use a Phillips screwdriver to remove the 2.9 mm-long screw from the sensor bracket.

  9. Huawei Watch 3 Motherboard Replacement, Remove the sensor bracket: step 10, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Remove the sensor bracket: step 10, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Remove the sensor bracket: step 10, image 3 of 3
    • User a pair of tweezers to move the top of the sensor bracket free from a small latch near the case by rotating in inwards.

    • Unhook the opposite side of the bracket and remove it.

  10. Huawei Watch 3 Motherboard Replacement, Unplug the sensor connector: step 11, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Unplug the sensor connector: step 11, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Unplug the sensor connector: step 11, image 3 of 3
    • Use the tip of a spudger to pry up and disconnect the sensor connector.

    • Remove the back cover.

  11. Huawei Watch 3 Motherboard Replacement, Disconnect the home button: step 12, image 1 of 2 Huawei Watch 3 Motherboard Replacement, Disconnect the home button: step 12, image 2 of 2
    • Use the tip of a spudger to disconnect the home button cable.

  12. Huawei Watch 3 Motherboard Replacement, Lift the battery: step 13, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Lift the battery: step 13, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Lift the battery: step 13, image 3 of 3
    • Insert the tip of an opening pick between the battery and the plastic frame opposite to the cables.

    • Use the opening pick to lift the battery up.

    • The battery is held down by mild adhesive.

  13. Huawei Watch 3 Motherboard Replacement, Remove the battery: step 14, image 1 of 2 Huawei Watch 3 Motherboard Replacement, Remove the battery: step 14, image 2 of 2
    • Grab the battery with your fingers and remove it.

    • For reassembly you may need to apply some adhesive to the new battery if it does not come equipped with it.

  14. Huawei Watch 3 Motherboard Replacement, Disconnect the display cables: step 15, image 1 of 3 Huawei Watch 3 Motherboard Replacement, Disconnect the display cables: step 15, image 2 of 3 Huawei Watch 3 Motherboard Replacement, Disconnect the display cables: step 15, image 3 of 3
    • Use the tip of a spudger to pry up and disconnect both display cables.

  15. Huawei Watch 3 Motherboard Replacement, Remove the four motherboard screws: step 16, image 1 of 1
    • Use a Phillips screwdriver to remove the four 2.9 mm-long screws securing the motherboard.

  16. Huawei Watch 3 Motherboard Replacement, Remove the motherboard: step 17, image 1 of 2 Huawei Watch 3 Motherboard Replacement, Remove the motherboard: step 17, image 2 of 2
    • Grab the motherboard with your fingers and lift it out of the case.

    • If you opted not to remove the battery, use the flat end of a spudger to lift the motherboard out of the case.

Conclusion

To reassemble your device, follow these instructions in reverse order. Apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

Take your e-waste to an R2 or e-Stewards certified recycler.


Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

Tobias Isakeit

Member since: 03/31/2014

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