Phone · Samsung · Galaxy S9
Samsung Galaxy S9 Logic Board Repair
Logic Board Repair guide for the Samsung Galaxy S9
Before you begin
Tools
- Precision Phillips #00 screwdriver
- Heat gun or iOpener
- Suction cup handle
- Plastic opening picks
- Plastic spudger
- Tweezers
- Anti-static wrist strap
- Soldering iron
- Desoldering braid
- Magnifying glass or headlamp
Parts / materials
- Flux
- 99% Isopropyl alcohol
- Replacement back glass adhesive cover
- Thermal pad/paste
- Lint-free microfiber cloth
Safety
- Discharge the phone battery below 25% prior to repair to minimize fire hazard
- Wear safety glasses to protect eyes from potential glass splinters during back cover removal
- Wear an anti-static wrist strap to prevent electrostatic discharge damage to delicate logic board components
- Operate soldering equipment in a well-ventilated space to avoid inhaling solder flux fumes
Overview
Step-by-step
- 1
Power Down Phone
1 minPress and hold the Power button, then select Power Off on the screen. Ensure the device is completely powered down before proceeding.
- 2
Remove SIM Card Tray
1 minInsert a SIM eject tool into the pinhole on top of the phone. Push firmly to pop out the tray and remove it.
- 3
Heat Rear Glass
3 minApply a heat gun or heated iOpener around the outer edges of the rear glass panel for two to three minutes to soften the factory adhesive.
- 4
Slice Rear Glass Adhesive
5 minAttach a suction cup to the lower rear glass, pull upward to create a small gap, and insert an opening pick. Slide the pick around all four edges to sever the adhesive.
- 5
Disconnect Fingerprint Sensor Cable
2 minGently swing the back cover up from the right side like a book. Use a plastic spudger to snap the short fingerprint reader cable off the motherboard before removing the cover completely.
- 6
Unscrew Wireless Charging Cover
4 minUse a Phillips #00 screwdriver to remove the 15 screws securing the upper wireless charging pad and midframe shield.
- 7
Pry Off Wireless Charging Assembly
2 minInsert a plastic opening tool beneath the top edge of the wireless charging pad assembly and gently lever it up and off the chassis.
- 8
Disconnect Battery Cable
1 minPry the battery connector straight up from its socket on the logic board using the flat end of a plastic spudger.
- 9
Remove Loudspeaker Assembly
2 minPry up the lower speaker housing from the bottom of the frame and lift it out to expose the lower board connectors.
- 10
Disconnect Display and Sensor Flex Cables
3 minUnplug the front camera, iris scanner, display flex cable, and headphone jack connector from the logic board using a spudger.
- 11
Disconnect Antenna Cables
2 minUse fine tweezers or a spudger to pry up the blue and white coaxial antenna cable heads from the bottom section of the board.
- 12
Remove Logic Board Retaining Screw
1 minRemove the single Phillips #00 screw securing the logic board near the top center of the chassis.
- 13
Lift Out Logic Board
2 minCarefully tilt the top of the logic board up from the chassis and remove it, taking care not to snag any lingering flex cables.
- 14
Inspect and Repair Board
15 minExamine damaged components under magnification. Use flux, soldering iron, and desoldering braid to reflow or replace faulty chips and surface-mount components.
- 15
Reinstall Logic Board
3 minAlign the logic board back into the phone chassis bottom-first, ensuring all underlying flex connectors remain resting on top of the board.
After your Samsung Galaxy S9 logic board repair
Power the Galaxy S9 back on and test the logic board repair function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S9 job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Samsung Galaxy S9 repair context in the encyclopedia, or open related DIY guides.
