Phone · OnePlus · Nord N300 5G
OnePlus Nord N300 5G Water Damage Repair
Water Damage Repair guide for the OnePlus Nord N300 5G
Before you begin
Tools
- Phillips #00 screwdriver
- Plastic opening picks
- Nylon spudger
- Heat gun or hair dryer
- Tweezers
- Soft-bristled ESD brush
- SIM eject tool
- Magnifying glass
Parts / materials
- 99% Isopropyl alcohol
- Microfiber cloth
- Pre-cut back cover adhesive
- Shallow container
Safety
- Wear an anti-static wrist strap to protect sensitive components from electrostatic discharge.
- Do not apply excessive heat above 80°C (176°F) to avoid damaging the plastic frame or battery.
- Work in a well-ventilated area when handling high-concentration isopropyl alcohol.
- Disconnect the battery before attempting any cleaning or removal of electronic components.
Overview
Step-by-step
- 1
Power down device
2 minTurn off the OnePlus Nord N300 5G completely and remove the SIM card tray using an eject pin.
- 2
Heat the rear cover
3 minApply gentle heat around the perimeter of the back cover for two minutes using a heat gun or heating pad to soften the adhesive.
- 3
Slice the rear adhesive
5 minInsert a thin plastic opening pick under the bottom edge of the back cover and carefully slide it around all sides.
- 4
Lift off the rear cover
2 minGently lift the plastic back cover off the chassis, ensuring the fingerprint flex cable is not strained.
- 5
Disconnect fingerprint sensor
2 minUse a plastic spudger to pry up the fingerprint sensor connector from the motherboard.
- 6
Unscrew the midframe
5 minRemove all Phillips #00 screws securing the upper and lower plastic midframe covers to the phone frame.
- 7
Remove the midframe
3 minInsert an opening tool under the edge of the midframe and pop it off the retaining clips.
- 8
Disconnect the battery
1 minDisconnect the main battery press connector immediately using a spudger to prevent electrical shorting.
- 9
Disconnect board flex cables
3 minUnplug the display flex cable, main interconnect cable, and coaxial antenna cables from both logic boards.
- 10
Remove motherboard
3 minUnscrew any remaining board screws and carefully lift the main logic board out of the plastic housing.
- 11
Remove daughterboard
3 minPry up and remove the lower daughterboard containing the USB-C charging port and primary microphone.
- 12
Submerge boards in IPA
5 minPlace both circuit boards into a shallow container filled with high-purity 99% isopropyl alcohol.
- 13
Scrub liquid corrosion
10 minUse a soft-bristled brush to gently scrub away white mineral deposits and corrosion around board components.
- 14
Inspect circuit boards
5 minExamine the cleaned boards under a magnifying glass for shorted components, burnt traces, or residual moisture.
- 15
Dry all components
15 minAllow the circuit boards, chassis, and sub-assemblies to completely air dry in a warm, dry area for at least two hours.
- 16
Reassemble and test
10 minReinstall the circuit boards, reattach all flex cables and the battery, then power on the device to verify full functionality.
After your OnePlus Nord N300 5G water damage repair
Power the Nord N300 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 OnePlus Nord N300 5G job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more OnePlus Nord N300 5G repair context in the encyclopedia, or open related DIY guides.
