Phone · Samsung · Galaxy Fold 4G
Samsung Galaxy Fold 4G Logic Board Repair
Logic Board Repair guide for the Samsung Galaxy Fold 4G
Before you begin
Tools
- Phillips #00 screwdriver
- Heat gun or hair dryer
- Suction cup tool
- Plastic opening picks
- Spudger tool
- Tweezers
- SIM eject tool
- Anti-static wrist strap
Parts / materials
- Pre-cut rear cover adhesive
- 99% Isopropyl alcohol
- Cleaning wipes
Safety
- Wear eye protection when heating and working around glass panels.
- Wear an anti-static wrist strap to avoid electrostatic discharge damage to delicate logic board components.
- Disconnect the battery press connectors immediately after removing the shield to eliminate electrical power.
Overview
Step-by-step
- 1
Eject SIM tray
1 minInsert a SIM eject tool into the pinhole on the left side of the device to pop out the SIM tray. Remove the tray from the frame completely.
- 2
Heat rear cover
3 minApply a heat gun set to low around the edges of the back glass cover for 2 to 3 minutes to soften the adhesive underneath.
- 3
Attach suction cup
2 minPlace a suction cup near the bottom edge of the rear glass cover. Press firmly and pull up to create a tiny gap between the glass and frame.
- 4
Slice rear adhesive
5 minInsert a plastic opening pick into the gap and slide it along the perimeter to slice through the adhesive holding the rear glass.
- 5
Remove rear glass cover
2 minGently lift the rear glass off the frame and set it aside in a clean, dust-free area.
- 6
Unscrew top motherboard shield
3 minRemove the Phillips #00 screws securing the upper plastic shield and wireless charging assembly.
- 7
Remove wireless charging bracket
2 minCarefully lift and peel the wireless charging coil and top plastic shield away from the upper motherboard.
- 8
Disconnect battery cables
2 minUse the flat end of a spudger to pop up the press connectors for both batteries to prevent short circuits during repair.
- 9
Disconnect interconnect flexes
3 minUnplug the display, hinge interconnect, and sub-board flex cables from the main logic board using a spudger.
- 10
Disconnect camera modules
3 minDisconnect the rear triple-camera array and front cover camera press connectors from the logic board.
- 11
Disconnect antenna coaxial cables
2 minGently pry up the coaxial antenna cable heads from their sockets on the bottom edge of the board using tweezers.
- 12
Unscrew logic board
2 minRemove the Phillips #00 screws anchoring the logic board to the aluminum chassis.
- 13
Pry up logic board
3 minInsert a spudger under the bottom edge of the motherboard and gently lift it out of the phone body.
- 14
Position new logic board
3 minSet the replacement logic board into the chassis, ensuring all underlying flex cables remain clear of the board.
- 15
Secure logic board screws
2 minReinstall the Phillips #00 retaining screws to fasten the motherboard down into the chassis.
- 16
Reconnect camera and flex cables
4 minSnap all camera modules, interconnect flexes, display cables, and coaxial antennas back into their board connectors.
- 17
Reconnect battery press connectors
1 minAlign and firmly press down the battery connectors into their sockets on the motherboard.
- 18
Reinstall wireless charging bracket
3 minPlace the wireless charging bracket over the motherboard and secure it using the Phillips #00 screws.
- 19
Seal rear cover
4 minApply new custom-cut adhesive to the perimeter frame and press the rear glass firmly back onto the chassis.
After your Samsung Galaxy Fold 4G logic board repair
Power the Galaxy Fold 4G 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 Fold 4G job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Prefer a professional repair?
Book Samsung Galaxy Fold 4G logic board repair at LML Repair in Seattle — same-day options available.
