If you ever find yourself in a scenario where you have a completely normal phone and then out of nowhere it ceases to operate. It may be time for a motherboard change. This guide will provide the step by step process of switching the processing component of the Samsung Galaxy J3 Luna Pro.

  1. Turn off the phone.
    • Turn off the phone.

    • Remove the back cover and battery

  2. Attach a suction cup to the screen and pry upwards.
    • Attach a suction cup to the screen and pry upwards.

    • Insert the plastic opening tool into the gap under the screen and work your way around the perimeter.

    • Don't remove the screen completely as there are cables still connection the two pieces.

    • Use the pointy end of a spudger to remove the white plastic cover from the display cover.

    • Use the spudger to pry up the display cable from the motherboard.

    • Remove the screen.

    • Remove the eleven JIS 00 screws from the mid-frame.

    • Using a spudger, pry the mid-frame from the screen.

    • Remove the motherboard from the mid-frame.


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

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