Phone · Motorola · Moto Edge 40
Motorola Moto Edge 40 Logic Board Repair
Logic Board Repair guide for the Motorola Moto Edge 40
Before you begin
Tools
- Heat gun or iOpener
- Precision screwdriver set
- Plastic opening picks
- Suction handle
- ESD-safe tweezers
- Soldering iron
- Magnifying glass or headlamp
- Nylon spudger
Parts / materials
- High-purity Isopropyl Alcohol (99%)
- Liquid Soldering Flux
- Desoldering braid
- Replacement back cover adhesive tape
Safety
- Wear an anti-static wrist strap to prevent electrostatic discharge damage.
- Wear safety glasses when working with solder and heating tools.
- Work in a well-ventilated area when using soldering flux and isopropyl alcohol.
- Ensure the battery is disconnected before performing any soldering or board work.
Overview
Step-by-step
- 1
Eject SIM Tray
1 minInsert a SIM eject tool into the hole at the bottom edge of the device. Push firmly to eject the tray and set it aside.
- 2
Heat Rear Glass
2 minApply a heat gun or iOpener set to 80°C (176°F) along the edges of the back cover for two minutes to soften the adhesive.
- 3
Attach Suction Cup
1 minPlace a suction handle on the lower back panel and pull upward gently to create a small gap.
- 4
Slice Back Cover Adhesive
4 minInsert a plastic opening pick into the gap and slide it along all four edges to cut through the adhesive seal.
- 5
Remove Rear Panel
1 minLift the rear cover away from the housing completely and clean away remaining adhesive residue.
- 6
Unscrew Top Midframe
3 minRemove the Phillips screws securing the upper motherboard shield and wireless charging assembly.
- 7
Pry Off Upper Bracket
2 minInsert a spudger under the top midframe cover and gently lever it off the chassis clips.
- 8
Disconnect Battery Cable
1 minPry the battery press connector directly straight up from the motherboard using a plastic spudger.
- 9
Detach Display Flex Cable
1 minUnclip the main display flex cable connector from its socket on the logic board.
- 10
Disconnect Interconnect and Antennas
2 minUnplug the sub-board interconnect ribbon cable and pop off the coaxial antenna cables using tweezers.
- 11
Remove Camera Modules
3 minDisconnect the front and rear camera press connectors and carefully lift the camera units out of the frame.
- 12
Remove Board Retaining Screws
2 minUnscrew the remaining Phillips screws holding the logic board to the inner frame.
- 13
Lift Out Logic Board
2 minGently lever up the edge of the logic board with a spudger and remove it from the device housing.
- 14
Inspect and Clean Board
5 minExamine the circuit board under magnification and scrub away corrosion using 99% isopropyl alcohol.
- 15
Reflow Damaged Components
10 minApply liquid flux to trace repairs or micro-components and re-solder broken contacts with a fine iron tip.
- 16
Reinstall Logic Board
2 minPlace the repaired motherboard back into the frame and replace the retaining screws.
- 17
Reconnect Flex Cables and Power
4 minReattach all camera modules, interconnect cables, coaxial antennas, and the battery press connector.
After your Motorola Moto Edge 40 logic board repair
Power the Moto Edge 40 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 Motorola Moto Edge 40 job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Motorola Moto Edge 40 repair context in the encyclopedia, or open related DIY guides.
