Phone · Motorola · G45 5G
Motorola G45 5G Logic Board Repair
Logic Board Repair guide for the Motorola G45 5G
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- Heat gun
- SIM eject tool
Parts / materials
- Desoldering braid
- Flux
- 99% Isopropyl alcohol
- Replacement back panel adhesive
Safety
- Wear an anti-static wrist strap to protect delicate micro-components from ESD damage.
- Perform soldering in a well-ventilated area to avoid inhaling chemical fumes.
- Disconnect the battery before touching solder tools to the logic board to prevent short circuits.
Overview
Step-by-step
- 1
Power off the phone
1 minPress and hold the power button, then select power off to shut down the device completely.
- 2
Eject the SIM tray
1 minInsert a SIM eject pin into the hole on the left edge of the phone to pop out the tray.
- 3
Heat the rear panel
2 minApply heat around the edges of the back cover using a heat gun set to low for two minutes to soften the adhesive.
- 4
Slice the rear adhesive
4 minInsert a thin plastic pick into the gap at the bottom and slide it around the perimeter to slice the factory tape.
- 5
Remove the back panel
1 minCarefully lift the rear glass panel away from the chassis and set it aside.
- 6
Unscrew the top bracket
3 minRemove the Phillips screws securing the upper plastic motherboard cover.
- 7
Remove the motherboard cover
2 minPry up the plastic cover using a spudger to reveal the logic board connectors beneath.
- 8
Disconnect the battery flex
1 minUse a plastic spudger to snap the battery connector straight up from its socket to cut power.
- 9
Disconnect the display cable
1 minPry up the display press-fit connector on the lower section of the main board.
- 10
Unplug all camera modules
3 minDisconnect the front and rear camera flex cables from the board and remove the cameras with tweezers.
- 11
Remove the board retaining screw
1 minUnscrew the single Phillips screw securing the logic board to the frame.
- 12
Lift out the logic board
2 minGently insert a flat spudger under the top edge of the board and pry it out of the chassis.
- 13
Inspect the board under magnification
5 minExamine the logic board using a magnifying glass to check for cracked solder joints or corroded trace lines.
- 14
Apply liquid flux
2 minDispense a small amount of soldering flux onto the targeted component or pad area.
- 15
Reflow the damaged joint
4 minTouch the preheated fine-tip soldering iron to the damaged joint for two seconds to reflow the solder.
- 16
Clean board residues
2 minWipe away residual flux from the logic board surface using a lint-free swab dipped in high-purity isopropyl alcohol.
After your Motorola G45 5G logic board repair
Power the G45 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 Motorola G45 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 Motorola G45 5G repair context in the encyclopedia, or open related DIY guides.
