Phone · Motorola · G15
Motorola G15 Logic Board Repair
Logic Board Repair guide for the Motorola G15
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Opening picks
- Heat gun or hair dryer
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- Anti-static wrist strap
Parts / materials
- Flux
- Isopropanol (99%)
- Desoldering braid
- Pre-cut back cover adhesive
Safety
- Disconnect the battery flex cable before attempting any soldering or component work on the logic board.
- Wear heat-resistant gloves when using a heat gun near plastic chassis parts.
- Work in a well-ventilated area to avoid inhaling toxic soldering fumes.
- Wear eye protection when reflowing solder or using liquid flux.
Overview
Step-by-step
- 1
Eject SIM Card Tray
1 minInsert a SIM eject tool or straightened paperclip into the hole next to the SIM tray, then pull the tray completely out.
- 2
Heat Back Cover Edges
3 minApply a heat gun or heating pad to the rear edges of the Moto G15 for 2 to 3 minutes to soften the perimeter adhesive.
- 3
Insert Opening Pick
2 minPress a suction cup onto the bottom rear panel, lift gently to create a small gap, and insert a plastic opening pick.
- 4
Slice Rear Adhesive
4 minSlide the pick around all four edges of the back panel to slice through the factory adhesive strip.
- 5
Remove Back Cover
1 minLift the rear panel off the frame cleanly and set it aside on a clean surface.
- 6
Unscrew Motherboard Cover Screws
3 minUse a Phillips #00 screwdriver to remove all visible screws holding the upper plastic motherboard shield in place.
- 7
Pry Off Upper Frame Shield
2 minInsert a spudger under the edge of the upper bracket and gently lift to detach it from the phone frame.
- 8
Disconnect Battery Press Connector
1 minUse the flat end of a plastic spudger to pry the battery flex cable directly up from its motherboard socket.
- 9
Disconnect Main Display Flex Cable
1 minPry up the display connector from the bottom corner of the logic board using a plastic tool.
- 10
Disconnect Interconnect Ribbon Cable
1 minLever the sub-board interconnect ribbon connector off the board to isolate the upper circuitry.
- 11
Unplug Front Camera
2 minUse precision tweezers to pop the front-facing camera module flex cable off the logic board.
- 12
Disconnect Antenna Coaxial Cables
2 minCarefully pry the head of each antenna coaxial cable up off the logic board trace pads.
- 13
Remove Board Retaining Screws
2 minRemove any remaining Phillips screws securing the logic board directly to the inner metal chassis.
- 14
Lift Out Logic Board
2 minGently lift the logic board up from the top edge and extract it completely from the phone housing.
- 15
Apply Flux to Target Component
3 minApply a small dab of liquid or paste flux onto the damaged surface-mount joint or connector pin under magnification.
- 16
Reflow Solder Joint
4 minTouch the fine tip of a hot soldering iron to the damaged pad for 2 to 3 seconds until the solder reflows cleanly.
- 17
Clean Board Residue
2 minScrub the repaired area gently using a cotton swab dipped in 99% isopropyl alcohol to remove burnt flux.
- 18
Reinstall Logic Board
2 minAlign the repaired logic board back into the chassis frame, ensuring no flex cables get trapped underneath.
- 19
Reconnect Flex Cables and Shield
4 minSnap all camera, display, and battery connectors firmly back into place, then screw down the upper protective shield.
After your Motorola G15 logic board repair
Power the G15 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 G15 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 G15 repair context in the encyclopedia, or open related DIY guides.
