Step-by-step

1. 1

   Power Off the Device

   1 min

   Ensure the Motorola Moto G100 is completely powered off before beginning. Do not attempt to charge the device if it has suffered water damage.

2. 2

   Heat the Rear Cover

   3 min

   Apply heat evenly across the edges of the back cover for 2 to 3 minutes using a heat gun. This softens the adhesive securing the rear panel.

3. 3

   Attach Suction Cup

   1 min

   Place a suction cup near the bottom edge of the back cover. Pull upward firmly to create a small gap between the panel and the frame.

4. 4

   Slice Rear Adhesive

   4 min

   Insert a plastic prying tool into the gap. Slide it carefully along all four edges to cut through the perimeter adhesive.

5. 5

   Disconnect Fingerprint Sensor

   2 min

   Slightly lift the back cover, taking care not to strain the side-mounted fingerprint cable. Use a spudger to detach the sensor connector from the board.

6. 6

   Remove Rear Panel

   1 min

   Lift the rear cover completely off the phone body and set it aside. Inspect the interior for visible liquid or moisture pools.

7. 7

   Unscrew Midframe Screws

   3 min

   Remove all Phillips #000 screws securing the plastic midframe and upper motherboard bracket. Keep the screws organized for reassembly.

8. 8

   Pry Off Midframe Bracket

   2 min

   Insert a plastic spudger under the edge of the midframe and gently pry it upward. Lift the midframe away to expose the internal components.

9. 9

   Disconnect Battery Connector

   1 min

   Use a plastic spudger to disconnect the battery flex cable directly from the motherboard. Disconnecting power immediately prevents electrical shorts.

10. 10

    Disconnect Board Interconnect Cables

    2 min

    Unplug the main display cable and lower interconnect flex cables from the motherboard. Pry straight up on the press connectors with your spudger.

11. 11

    Extract Mainboard Assembly

    2 min

    Gently pry up the motherboard from its recess using a spudger. Remove the board carefully without bending the circuit board or damaging attached cameras.

12. 12

    Remove Lower Loudspeaker Bracket

    2 min

    Unscrew the Phillips #000 screws securing the bottom loudspeaker assembly. Pry the speaker module out to expose the lower daughterboard.

13. 13

    Extract Daughterboard

    2 min

    Disconnect the antenna coaxial cable and bottom interconnect flex from the daughterboard. Carefully lever the daughterboard out of the housing.

14. 14

    Clean Circuit Boards with Alcohol

    5 min

    Submerge a soft brush in 99% isopropyl alcohol and gently scrub both sides of the motherboard and daughterboard. Focus on areas showing corrosion, white residue, or mineral deposits.

15. 15

    Dry Components with Compressed Air

    3 min

    Blow compressed air across the cleaned circuit boards to displace trapped liquid and loosen debris. Allow the parts to air-dry completely for at least 30 minutes.

16. 16

    Reinstall Motherboard and Daughterboard

    4 min

    Place the dried daughterboard and motherboard back into their frame locations. Reconnect the coaxial antenna wire and main interconnect flex cables.

17. 17

    Reconnect Battery and Fasten Midframe

    3 min

    Snap the battery flex cable back onto the motherboard terminal. Position the plastic midframe cover and tighten all Phillips #000 screws securely.

18. 18

    Apply Adhesive and Reseal Device

    4 min

    Reconnect the fingerprint sensor cable and apply new adhesive strips along the phone frame. Press the rear cover firmly into place to finish the repair.