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Phone · Motorola · G20

Motorola G20 Logic Board Repair

Logic Board Repair guide for the Motorola G20

Difficult
~50 min
15 steps

Before you begin

Tools

  • Phillips #00 Screwdriver
  • Plastic opening tools
  • SIM Eject Tool
  • Tweezers
  • Magnifying glass or headlamp
  • Soldering iron

Parts / materials

  • Flux
  • Desoldering braid
  • Isopropyl Alcohol (99%)

Safety

  • Wear an anti-static wrist strap to prevent electrostatic discharge damage to delicate board ICs.
  • Disconnect the battery press-connector before performing any further disassembly on the logic board.
  • Work in a well-ventilated area when heating soldering flux to avoid inhaling fumes.

Overview

# Motorola G20 Logic Board Repair Repair Guide Action-specific logic board repair walkthrough for the Motorola G20. About 50 minutes across 15 steps. This DIY guide walks through logic board repair on the Motorola G20 (Moto G series phone). Before you open the device, confirm the exact model number on the Motorola settings screen or rear housing so your replacement part matches the G20 specifically—not a similar Moto G sibling. Most DIY techs finish this Motorola G20 logic board repair in about 50 minutes when parts and tools are ready. Difficulty is rated advanced for this model. Recommended tools for this Motorola G20 job: Phillips #00 Screwdriver, Plastic opening tools, SIM Eject Tool, Tweezers, Magnifying glass or headlamp, Soldering iron. Parts and supplies: Flux, Desoldering braid, Isopropyl Alcohol (99%). Power the G20 off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Motorola G20, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle logic board repair for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Eject the SIM Tray

    1 min

    Insert a SIM eject tool into the hole next to the SIM tray on the left side of the phone. Push firmly to eject the tray and remove it completely.

  2. 2

    Unclip the Rear Cover

    3 min

    Insert a plastic opening pick into the seam between the plastic rear cover and the display bezel near the SIM slot. Pry outward to release the plastic clips around the perimeter.

  3. 3

    Detach the Rear Cover

    2 min

    Gently lift the rear cover off the chassis, taking care not to strain the attached fingerprint sensor ribbon cable.

  4. 4

    Disconnect the Fingerprint Cable

    2 min

    Use a plastic spudger to pry the fingerprint sensor press-connector up from the motherboard, then set the rear cover aside.

  5. 5

    Unscrew the Board Shield

    4 min

    Remove the eleven Phillips #00 screws securing the plastic upper motherboard shield to the chassis.

  6. 6

    Remove the Board Shield

    2 min

    Pry up and remove the plastic motherboard shield using tweezers or an opening tool.

  7. 7

    Disconnect the Battery Cable

    1 min

    Use a plastic spudger to disconnect the battery flex cable from the top left of the motherboard to prevent short circuits.

  8. 8

    Disconnect the Flex Cables

    2 min

    Pry up the display flex connector and main interconnect flex connector from their sockets on the motherboard.

  9. 9

    Disconnect the Antenna Wire

    2 min

    Use precision tweezers to unsnap the black coaxial antenna cable connector from the right edge of the motherboard.

  10. 10

    Remove the Board Screw

    2 min

    Remove the single Phillips #00 screw securing the logic board to the inner frame.

  11. 11

    Pry Out the Logic Board

    3 min

    Insert a plastic spudger under the bottom edge of the logic board and carefully lift it out of the device frame.

  12. 12

    Repair Damaged Board Components

    15 min

    Inspect the logic board under magnification, applying flux and using a soldering iron or hot air rework station to repair damaged components or solder joints.

  13. 13

    Reinstall the Logic Board

    2 min

    Align the repaired logic board over the phone frame and press it gently into position until it sits flat.

  14. 14

    Reconnect Flex Cables and Antenna

    4 min

    Snap the coaxial antenna, interconnect flex cable, display flex cable, and battery connector back onto their motherboard sockets.

  15. 15

    Reattach Shield and Rear Cover

    5 min

    Reinstall the plastic shield with its eleven screws, connect the fingerprint sensor cable, and snap the back cover firmly back onto the chassis.

After your Motorola G20 logic board repair

Power the G20 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 G20 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 G20 repair context in the encyclopedia, or open related DIY guides.

Repair encyclopediaAll G20 guides
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