Phone · Samsung · Galaxy Z Flip 3 5G
Samsung Galaxy Z Flip 3 5G Logic Board Repair
Logic Board Repair guide for the Samsung Galaxy Z Flip 3 5G
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- Desoldering braid
- Heat gun or iOpener
- Suction handle
Parts / materials
- Flux
- 99% Isopropyl alcohol
- Pre-cut back glass adhesive strips
Safety
- Wear safety glasses while heating glass and performing micro-soldering.
- Always disconnect the battery before attempting board-level repairs to avoid short circuits.
- Work in a well-ventilated area to avoid inhaling soldering flux fumes.
Overview
Step-by-step
- 1
Heat Upper Glass Cover
3 minApply a heat gun or iOpener to the top back glass panel for 2 minutes to soften the adhesive beneath.
- 2
Attach Suction Handle
2 minPress a suction cup onto the upper rear glass near the top edge and gently pull up to create a small gap.
- 3
Slice Upper Glass Adhesive
4 minInsert an opening pick into the gap and slice along the top and side edges to separate the adhesive.
- 4
Pry Up Top Glass Panel
2 minGently hinge open the upper glass panel from the right edge, taking care not to strain the cover screen flex cable.
- 5
Disconnect Cover Display Flex
2 minUse the pointed end of a spudger to pop the cover display flex cable straight up from its motherboard socket.
- 6
Remove Upper Motherboard Shield Screws
3 minUnscrew the ten Phillips screws securing the plastic upper motherboard shield and wireless charging coil.
- 7
Pry Off Upper Shield Assembly
2 minInsert a spudger under the bottom edge of the upper plastic shield and lift it off the chassis.
- 8
Disconnect Upper Battery Cable
1 minPry the primary battery flex connector straight up from the motherboard to cut power to the device.
- 9
Disconnect Rear Cameras
2 minUse plastic tweezers or a spudger to disconnect the wide and ultrawide camera flex cables from the logic board.
- 10
Disconnect Interconnect and Antenna Flexes
3 minUnplug the main display ribbon, lower sub-board interconnect cable, and 5G antenna connectors from the mainboard.
- 11
Remove Logic Board Retaining Screws
2 minRemove the two Phillips screws holding the upper logic board down to the frame.
- 12
Extract Main Logic Board
3 minCarefully lift the main logic board out of the upper housing, starting from the bottom edge near the hinge.
- 13
Clean and Inspect Damaged Traces
10 minExamine the board under magnification and clean corrosion or damaged pads using 99% isopropyl alcohol.
- 14
Solder Replacement Micro-Components
15 minApply flux and use a fine-tip soldering iron or hot air station to reflow or replace faulty SMD components.
- 15
Reseat Logic Board into Frame
3 minLower the repaired mainboard back into the upper housing and secure it with its original screws.
- 16
Reconnect Flex Cables and Power
4 minSnap all camera, interconnect, and antenna cables back onto the board, plugging the battery cable in last.
- 17
Reinstall Shield and Top Panel
5 minScrew the motherboard shield back into place, reconnect the cover display, and press down the top glass panel with fresh adhesive.
After your Samsung Galaxy Z Flip 3 5G logic board repair
Power the Galaxy Z Flip 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 Flip 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 Flip 3 5G logic board repair at LML Repair in Seattle — same-day options available.
