Phone · Samsung · Galaxy Z Fold 3 5G
Samsung Galaxy Z Fold 3 5G Logic Board Repair
Logic Board Repair guide for the Samsung Galaxy Z Fold 3 5G
Before you begin
Tools
- Heat gun or hair dryer
- Suction cup tool
- Plastic prying tools
- Precision screwdriver set (Phillips #00)
- Tweezers
- Spudger tool
- Anti-static wrist strap
Parts / materials
- Replacement Galaxy Z Fold 3 5G logic board
- Pre-cut rear cover adhesive strips
- Isopropanol alcohol (99%)
- Thermal pad/paste
Safety
- Disconnect all battery press-fit connectors before touching motherboard components to avoid short-circuiting.
- Wear safety glasses to protect against potential glass fragments when removing heated panels.
- Use an anti-static wrist strap to prevent electrostatic discharge damage to sensitive microchips.
Overview
Step-by-step
- 1
Remove the SIM Card Tray
2 minPower off the device completely. Insert a SIM eject tool into the hole beside the SIM tray and remove the tray.
- 2
Heat the Rear Cover
3 minApply heat along the perimeter of the rear glass panel using a heat gun for 2 to 3 minutes to soften the underlying adhesive.
- 3
Slice the Rear Glass Adhesive
5 minAttach a suction cup near the edge and pull up to create a small gap. Insert a plastic opening pick and carefully slide it around the perimeter.
- 4
Lift Off the Rear Glass
2 minGently lift the rear glass panel away from the main housing and set it on your workspace mat.
- 5
Unscrew the Top Frame Shield
4 minUse a Phillips #00 screwdriver to remove the 10 screws securing the upper motherboard shield and wireless charging pad assembly.
- 6
Disconnect the Battery Flex Cables
2 minPry up both battery connectors from the mainboard using a plastic spudger to isolate power immediately.
- 7
Remove the Wireless Charging Pad
3 minUse a spudger to lift and peel the wireless charging coil and upper bracket off the chassis.
- 8
Disconnect Display and Front Camera Flexes
3 minUse the edge of a spudger to unclip the main display flex cable, cover screen flex, and front camera connectors.
- 9
Disconnect the Sub-Board Interconnect Cables
2 minUnclip the interconnect flex cables spanning from the main logic board down to the lower sub-board.
- 10
Disconnect Antenna Coaxial Cables
2 minUse precision tweezers to gently unsnap the RF coaxial antenna connectors from their sockets on the motherboard.
- 11
Disconnect Rear Camera Assemblies
3 minUnclip each of the rear camera module press connectors from the logic board surface.
- 12
Remove Motherboard Retaining Screws
2 minUnscrew the single Phillips #00 screw securing the top portion of the main logic board to the frame.
- 13
Pry Up the Logic Board
3 minInsert a spudger under the top edge of the board and gently lever it up from its housing recess.
- 14
Lift Out the Logic Board
2 minGrasp the logic board by its edges and carefully lift it clear of the phone frame, ensuring no cables catch.
After your Samsung Galaxy Z Fold 3 5G logic board repair
Power the Galaxy Z Fold 3 5G 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 Z Fold 3 5G 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 Z Fold 3 5G logic board repair at LML Repair in Seattle — same-day options available.
