Phone · Samsung · Galaxy Z Fold 4 5G
Samsung Galaxy Z Fold 4 5G Water Damage Repair
Water Damage Repair guide for the Samsung Galaxy Z Fold 4 5G
Before you begin
Tools
- Phillips #000 screwdriver
- Heat gun or hair dryer
- Suction cup tool
- Plastic prying tools
- Spudger tool
- Soft brush
- Tweezers
- Magnifying glass
Parts / materials
- Isopropyl alcohol (99%)
- Lint-free microfiber cloth
- Replacement rear glass adhesive strips
- Compressed air
Safety
- Wear safety glasses when working with heating tools and compressed air.
- Never use metallic tools near active battery terminals.
- Work in a well-ventilated area when using high-concentration isopropyl alcohol.
Overview
Step-by-step
- 1
Power Off Device Immediately
1 minTurn off the Galaxy Z Fold 4 instantly and do not connect a charger to prevent short circuits.
- 2
Heat Rear Glass Cover
3 minApply heat to the outer rear glass using a heat gun set to 80°C for two minutes to soften the perimeter adhesive.
- 3
Slice Rear Glass Adhesive
5 minAttach a suction cup near the bottom edge, pull up slightly, and insert a plastic pick to slice through the adhesive.
- 4
Remove Rear Glass Panel
2 minCarefully lift the rear glass panel off the chassis and set it aside on your clean workspace mat.
- 5
Heat Cover Screen Perimeter
3 minApply gentle heat around the outer display edges for two minutes to loosen the display adhesive.
- 6
Disconnect Cover Screen Ribbon
5 minPry up the outer screen, insert a plastic pick along the edge, and disconnect its display cable from the mainboard.
- 7
Unscrew Midframe Shield
5 minUse a Phillips #000 screwdriver to remove all visible screws securing the midframe and wireless charging pad.
- 8
Remove Wireless Charging Assembly
3 minGently lift up the wireless charging coil and attached midframe shield using a plastic spudger.
- 9
Disconnect Main Battery Connectors
2 minUse a spudger to pry up both press-fit battery cables immediately to cut power to the mainboard.
- 10
Disconnect Sub-Board Flex Cables
3 minUnplug the interconnect flex cables linking the main logic board to the bottom USB charging port sub-board.
- 11
Remove Mainboard Screws
3 minUnscrew the remaining Phillips #000 screws holding the motherboard inside the upper housing.
- 12
Extract Main Logic Board
3 minLever a plastic spudger underneath the motherboard edges to lift it out of the phone chassis.
- 13
Scrub Logic Board Corrosion
10 minDip a soft brush in 99% isopropyl alcohol and scrub away white liquid residue and oxidation on the circuit board.
- 14
Clean Sub-Board and Connectors
8 minClean the bottom USB-C sub-board, camera connectors, and display terminals with alcohol and the soft brush.
- 15
Dry Circuit Components
10 minBlow away liquid remnants using short bursts of compressed air, then allow the boards to dry completely.
- 16
Inspect Board under Magnifier
5 minExamine the cleaned surface-mount components under a magnifying glass for shorted, burnt, or broken trace pads.
After your Samsung Galaxy Z Fold 4 5G water damage repair
Power the Galaxy Z Fold 4 5G back on and test the water damage 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 4 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 4 5G water damage repair at LML Repair in Seattle — same-day options available.
