Phone · Motorola · G40 Fusion
Motorola G40 Fusion Logic Board Repair
Logic Board Repair guide for the Motorola G40 Fusion
Before you begin
Tools
- Phillips #000 screwdriver
- Heat gun or hair dryer
- Suction cup tool
- Plastic prying tools
- Spudger tool
- Tweezers
- SIM eject tool
Parts / materials
- Replacement Motorola G40 Fusion logic board
- Pre-cut back cover adhesive sticker
- Isopropyl alcohol (99%)
Safety
- Always power down the device completely before starting any disassembly.
- Disconnect the battery press connector before removing any other cables to prevent electrical shorts.
- Wear safety glasses when heating and prying plastic panels to protect against glass or plastic shrapnel.
Overview
Step-by-step
- 1
Eject SIM tray
1 minInsert a SIM eject tool into the hole on the left side of the frame. Push firmly to eject the tray and set it aside.
- 2
Heat back cover
3 minApply heat to the edges of the rear cover using a heat gun for 2 to 3 minutes to soften the adhesive.
- 3
Attach suction cup
1 minPress a suction cup onto the lower section of the back panel and pull up firmly to create a small gap.
- 4
Slice cover adhesive
4 minInsert an opening pick into the gap and slide it along the perimeter to slice through the adhesive seal.
- 5
Detach fingerprint cable
2 minSlightly lift the back cover and use a spudger to disconnect the fingerprint reader flex cable from the mainboard.
- 6
Unscrew upper frame
3 minRemove all Phillips #000 screws securing the plastic motherboard protective cover.
- 7
Pry off upper cover
2 minUse a plastic spudger to gently lever up and remove the plastic motherboard cover and loudspeaker section.
- 8
Disconnect battery cable
1 minPry the battery connector straight up from its socket on the motherboard to cut power.
- 9
Disconnect display cable
1 minUse a spudger to unclip the main display flex cable from the right side of the logic board.
- 10
Disconnect interconnect cable
1 minUnplug the main sub-board ribbon cable from the bottom edge of the logic board.
- 11
Unplug antenna cable
2 minUse precision tweezers to pry up the white coaxial antenna cable connector from the board.
- 12
Remove camera modules
3 minDisconnect the front-facing and rear camera press connectors, then lift the cameras out of the frame.
- 13
Unscrew logic board
1 minRemove the single Phillips #000 screw securing the logic board near the top corner.
- 14
Extract logic board
2 minCarefully tilt the logic board up from the top edge and lift it out of the phone body.
- 15
Install new logic board
2 minSet the replacement logic board into the chassis, ensuring no flex cables are trapped beneath it.
- 16
Reassemble device
8 minReconnect the cameras, antenna, flex cables, battery, and top cover in reverse order before sealing the back cover.
After your Motorola G40 Fusion logic board repair
Power the G40 Fusion 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 G40 Fusion 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 G40 Fusion repair context in the encyclopedia, or open related DIY guides.
