Phone · Motorola · G14
Motorola G14 Logic Board Repair
Logic Board Repair guide for the Motorola G14
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- Desoldering braid
- Heat gun
- SIM eject tool
- Opening picks
Parts / materials
- Flux
- 99% Isopropyl alcohol
- Replacement back cover adhesive tape
Safety
- Wear an anti-static wrist strap to prevent electrostatic discharge damage to the board.
- Disconnect the battery before touching or soldering motherboard components.
- Perform soldering in a well-ventilated area to avoid inhaling flux fumes.
Overview
Step-by-step
- 1
Eject the SIM card tray
1 minInsert a SIM eject tool into the hole on the side of the phone. Push firmly until the tray pops out and remove it completely.
- 2
Heat the back cover
2 minApply heat around the edges of the rear panel using a heat gun for two minutes to soften the adhesive.
- 3
Insert an opening pick
2 minAttach a suction cup near the bottom edge and pull upward to create a small gap. Slide a thin opening pick into the seam.
- 4
Slice rear panel adhesive
3 minSlide the pick around all edges of the phone to cut through the perimeter adhesive. Take care around the power button flex cable.
- 5
Lift off the back cover
1 minGently lift the back cover off the chassis and set it aside once freed from remaining adhesive.
- 6
Unscrew the upper motherboard shield
3 minRemove the Phillips screws holding the plastic motherboard cover in place using a precision screwdriver.
- 7
Remove the upper motherboard shield
1 minPry up the edges of the plastic cover with a spudger and lift it off the board.
- 8
Disconnect the battery cable
1 minUse the flat end of a plastic opening tool to pop the battery connector straight up from the motherboard.
- 9
Disconnect interconnect and display flexes
2 minUnplug the display cable and the main interconnect cable connectors from the logic board.
- 10
Disconnect the antenna coaxial cable
1 minUse tweezers to carefully pry up the antenna connector head from its terminal on the logic board.
- 11
Remove camera modules
2 minDisconnect the front and rear camera flex cables, then lift the camera modules out of their recesses.
- 12
Remove motherboard retaining screws
2 minUnscrew any remaining screws securing the logic board directly to the inner metal frame.
- 13
Pry up the logic board
2 minGently wedge a plastic spudger under the edge of the board and lift it out of the phone body.
- 14
Inspect board under magnification
4 minPosition the logic board under a magnifying glass to check for cracked solder joints, corrosion, or burnt components.
- 15
Apply liquid flux
2 minApply a small drop of flux over damaged joints or component pads requiring rework.
- 16
Reflow or desolder component joints
10 minUse a fine-tip soldering iron and desoldering braid to re-solder or replace defective micro-components.
- 17
Reinstall the logic board
2 minSeat the logic board back into the device frame, ensuring all flex cables sit above the board.
- 18
Reconnect flex cables and battery
3 minPress the camera, display, interconnect, and battery connectors firmly back into their respective sockets.
After your Motorola G14 logic board repair
Power the G14 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 G14 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 G14 repair context in the encyclopedia, or open related DIY guides.
