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Samsung Galaxy Watch3 Motherboard Replacement

What you need

  1. Samsung Galaxy Watch3 Motherboard Replacement, Unfasten the back cover screws: step 1, image 1 of 1
    • Before starting repairs, take your watch off the charger and power it down.

    • Use a Tri-point Y00 driver to unfasten the four screws on the back of the watch.

    • Don’t worry about removing the screws, they will stay in place in the back cover.

  2. Samsung Galaxy Watch3 Motherboard Replacement, Wedge open the back cover: step 2, image 1 of 2 Samsung Galaxy Watch3 Motherboard Replacement, Wedge open the back cover: step 2, image 2 of 2
    • Insert an opening tool between the back cover and the metal housing.

    • Twist the opening tool to create a wider gap.

    • Don't fully remove the back cover just yet. The sensor flex cable is still connected to the motherboard.

  3. Samsung Galaxy Watch3 Motherboard Replacement, Disconnect the sensor flex cable: step 3, image 1 of 3 Samsung Galaxy Watch3 Motherboard Replacement, Disconnect the sensor flex cable: step 3, image 2 of 3 Samsung Galaxy Watch3 Motherboard Replacement, Disconnect the sensor flex cable: step 3, image 3 of 3
    • Lay the watch face down.

    • Carefully lift the back cover up from the edge with the buttons to access the sensor connector.

    • Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.

  4. Samsung Galaxy Watch3 Motherboard Replacement, Remove the back cover: step 4, image 1 of 2 Samsung Galaxy Watch3 Motherboard Replacement, Remove the back cover: step 4, image 2 of 2
    • Remove the back cover.

    • Make sure the rubber gasket (marked red) is undamaged. If damaged replace it with a new one during reassembly to maintain proper water resistance.

  5. Samsung Galaxy Watch3 Motherboard Replacement, Unplug the three connectors: step 5, image 1 of 3 Samsung Galaxy Watch3 Motherboard Replacement, Unplug the three connectors: step 5, image 2 of 3 Samsung Galaxy Watch3 Motherboard Replacement, Unplug the three connectors: step 5, image 3 of 3
    • Use the flat end of a spudger to disconnect the flex cables of the side buttons, the display and the hall sensor.

  6. Samsung Galaxy Watch3 Motherboard Replacement, Unfasten the motherboard screw: step 6, image 1 of 1
    • Remove the Phillips #00 screw.

  7. Samsung Galaxy Watch3 Motherboard Replacement, Remove the motherboard: step 7, image 1 of 2 Samsung Galaxy Watch3 Motherboard Replacement, Remove the motherboard: step 7, image 2 of 2
    • The motherboard is held in place by two small plastic clips.

    • Use a pair of blunt tweezers to lift the motherboard out from underneath the plastic clips towards the buttons.

    • Remove the motherboard.

Tobias Isakeit

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