Step-by-step

1. 1

   Eject the SIM card tray

   1 min

   Insert a SIM eject tool into the small hole on the left side of the device. Push firmly inward to release the tray, then pull it out of the frame.

2. 2

   Pry open the rear cover seam

   3 min

   Insert a plastic opening pick into the seam between the back panel and display frame near the SIM slot. Slide the pick around the perimeter to disengage the internal plastic clips.

3. 3

   Detach the rear cover

   2 min

   Gently lift the back cover away from the phone, being careful not to strain the attached fingerprint sensor cable. Rest the cover right side up next to the chassis.

4. 4

   Remove motherboard bracket screws

   4 min

   Use a Precision Phillips #00 screwdriver to remove the 11 screws securing the plastic motherboard protective bracket. Keep the screws organized for reassembly.

5. 5

   Remove the motherboard bracket

   2 min

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

6. 6

   Disconnect the fingerprint sensor flex

   1 min

   Use the flat end of a spudger to pop the fingerprint sensor press-connector straight off the motherboard socket. Set the detached rear cover aside.

7. 7

   Disconnect the battery cable

   1 min

   Pry the battery press-connector straight up off the board with a plastic spudger. Disconnecting power prevents accidental electrical shorts during repair.

8. 8

   Disconnect the display flex cable

   2 min

   Lever the main display flex connector up from its socket on the lower edge of the logic board. Handle the ribbon connector gently to avoid damaging pins.

9. 9

   Disconnect the interconnect flex cable

   2 min

   Pry up the lower ribbon connector linking the motherboard to the daughterboard using a plastic spudger. Lift the flex end out of the way.

10. 10

    Unplug the antenna coaxial cables

    3 min

    Gently wedge fine-tip tweezers beneath the metal antenna cable heads and pop both black and white coaxial cables off the logic board.

11. 11

    Remove the rear camera module

    3 min

    Disconnect the rear camera array flex cables from the board with a spudger. Lift the camera housing out and place it in a dust-free space.

12. 12

    Lift out the logic board

    2 min

    Insert a spudger beneath the bottom edge of the motherboard and lever it gently up. Pull the board out of the chassis alignment pins.

13. 13

    Inspect the circuit board

    5 min

    Examine the logic board under a magnifying glass to locate broken solder joints, bridged pins, or liquid corrosion. Identify the damaged micro-components.

14. 14

    Clean corrosion with isopropyl alcohol

    4 min

    Dip an ESD-safe brush into 99% isopropyl alcohol and gently scrub damaged surface pads. Blot excess moisture with a microfiber swab.

15. 15

    Reflow cold solder joints

    8 min

    Apply liquid rosin flux to the target component leads. Touch a pre-heated soldering iron tip with desoldering braid or fresh solder to reflow the joint until clean.

16. 16

    Reinstall the logic board

    3 min

    Align the top edge of the repaired logic board with the chassis cutouts and press it down firmly. Ensure no ribbon cables are trapped underneath.