Step-by-step

1. 1

   Power off device and remove SIM tray

   2 min

   Turn off the phone immediately to prevent further electrical shorts. Insert a SIM eject tool into the hole on the left side to pop out the SIM card tray.

2. 2

   Warm the back cover adhesive

   3 min

   Apply heat evenly across the back cover using a heat gun or hair dryer for 1 to 2 minutes. This softens the adhesive securing the plastic rear panel.

3. 3

   Apply suction cup to back cover

   2 min

   Press a suction cup firmly onto the lower back cover near the USB-C port. Pull upward gently to create a small gap between the cover and the frame.

4. 4

   Slice the rear cover adhesive

   5 min

   Insert a plastic opening pick into the gap created by the suction cup. Slide the pick around all four edges to release the adhesive tape.

5. 5

   Disconnect the fingerprint sensor

   3 min

   Carefully lift the rear cover slightly from the left edge like a book. Use a spudger to pop the fingerprint sensor flex cable off its motherboard socket.

6. 6

   Unscrew the upper motherboard bracket

   4 min

   Remove the Phillips #000 screws securing the plastic motherboard shield. Keep the screws organized by location for easier reassembly.

7. 7

   Remove the motherboard bracket

   2 min

   Pry up the edges of the plastic motherboard bracket using a spudger. Lift it off the chassis and set it aside.

8. 8

   Disconnect the battery cable

   2 min

   Pry up the battery press-connector directly from the motherboard using a plastic spudger. This cuts all electrical power to prevent further damage.

9. 9

   Disconnect the display and board interconnect cables

   4 min

   Use a spudger to disconnect the display flex cable, main board interconnect flex, and button flex cables. Disconnect the antenna cable with fine tweezers.

10. 10

    Unscrew the motherboard

    3 min

    Remove the remaining Phillips #000 screws anchoring the motherboard to the frame. Check all corners to ensure no hidden screws remain.

11. 11

    Extract the motherboard

    3 min

    Gently lift the motherboard by its edges using a spudger. Never force it out if it resists; check for snagging cables.

12. 12

    Unscrew and remove the speaker module

    3 min

    Remove the Phillips #000 screws holding the bottom loudspeaker assembly in place. Pry up and remove the speaker housing.

13. 13

    Remove the lower daughterboard

    3 min

    Disconnect the interconnect cable and antenna line from the bottom daughterboard. Lift the daughterboard out of the frame carefully.

14. 14

    Inspect for corrosion and liquid ingress

    3 min

    Use a magnifying glass to locate green or white corrosion marks on the circuit boards and connectors. Take note of heavily affected areas.

15. 15

    Clean components with isopropyl alcohol

    6 min

    Submerge the motherboard and daughterboard in a shallow container filled with 99% isopropyl alcohol for 5 minutes. Do not submerge the battery or screen.

16. 16

    Scrub corrosion with a soft brush

    8 min

    Gently brush away all visible corrosion from the board components using a soft-bristled brush soaked in 99% alcohol. Focus on connector contacts and chips.

17. 17

    Dry components with compressed air

    10 min

    Blow compressed air across the boards from a short distance to clear away alcohol and dissolved residue. Allow the parts to dry completely on a clean mat.

18. 18

    Reassemble components and test functionality

    10 min

    Reinstall the daughterboard, motherboard, connect all flex cables, and attach the battery. Power on the device to verify functionality before sealing the back cover.