Phone · Motorola · Moto E20
Motorola Moto E20 Logic Board Repair
Logic Board Repair guide for the Motorola Moto E20
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- SIM eject tool
Parts / materials
- Flux
- Desoldering braid
- Isopropyl alcohol (99%)
Safety
- Wear an anti-static wrist strap to prevent electrostatic discharge damage to delicate components.
- Disconnect the battery immediately after removing the board cover before using metal tools near active traces.
- Ensure adequate ventilation when working with heated solder flux fumes.
Overview
Step-by-step
- 1
Eject the SIM card tray
1 minInsert a SIM eject tool into the hole beside the tray to pop out the SIM and microSD card holder.
- 2
Unclip the rear panel
4 minInsert a plastic opening pick into the seam near the charging port and slide it around the perimeter to release the plastic clips.
- 3
Disconnect the fingerprint sensor
2 minSlightly lift the back cover and use a plastic spudger to detach the fingerprint reader flex cable from the motherboard.
- 4
Remove the upper bracket screws
3 minUse a Phillips screwdriver to remove all screws securing the plastic protective cover over the logic board.
- 5
Lift off the motherboard cover
1 minPry up the plastic cover using a spudger and set it aside.
- 6
Disconnect the battery cable
1 minUse a plastic spudger to disconnect the battery flex connector to shut off power to the device.
- 7
Disconnect the interconnect cable
2 minPry up the flex cable connector linking the logic board to the lower daughterboard.
- 8
Disconnect the display flex cable
2 minCarefully pry up the display ribbon cable connector from the upper left side of the motherboard.
- 9
Unplug the antenna coaxial cable
2 minUse precision tweezers to lift the antenna cable connector straight up off its socket on the logic board.
- 10
Detach the camera modules
3 minUnplug the front and rear camera flex connectors, then remove the cameras from their recesses.
- 11
Remove the logic board retaining screw
1 minUnscrew the single Phillips screw holding the logic board down to the phone frame.
- 12
Remove the logic board
2 minGently lift the logic board from its top edge and remove it completely from the phone chassis.
- 13
Reflow or solder damaged board components
12 minApply flux to targeted solder points under magnification and use a soldering iron or desoldering braid to correct bridged or cold solder joints.
- 14
Reinstall the logic board
2 minPosition the logic board back into the chassis and press down gently until it sits flush.
After your Motorola Moto E20 logic board repair
Power the Moto E20 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 E20 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 E20 repair context in the encyclopedia, or open related DIY guides.
