Phone · Motorola · Moto G73
Motorola Moto G73 Logic Board Repair
Logic Board Repair guide for the Motorola Moto G73
Before you begin
Tools
- Phillips #00 screwdriver
- Plastic opening picks
- Spudger
- Suction cup
- Fine-tip tweezers
- Heat gun or iOpener
- Soldering iron with fine tip
- Magnifying visor or microscope
- SIM eject tool
Parts / materials
- Liquid flux
- Desoldering braid
- Lead-free solder wire
- 99% Isopropyl alcohol
- Pre-cut back cover adhesive tape
Safety
- Wear an ESD grounding wrist strap to prevent electrostatic discharge to sensitive logic board ICs.
- Operate in a well-ventilated room or use a fume extractor when soldering and applying flux.
- Always disconnect the battery connector prior to using metallic tools near the circuit board.
- Wear safety glasses while soldering to protect against flux splatter.
Overview
Step-by-step
- 1
Eject the SIM Tray
2 minInsert a SIM eject tool into the small hole on the left frame edge. Press firmly to pop out the tray and remove it completely.
- 2
Heat the Back Panel
3 minApply a heat gun or heated pad set to 80°C along the edges of the back cover for three minutes to soften the perimeter adhesive.
- 3
Slice the Rear Adhesive
5 minPress a suction cup near the bottom edge of the back panel, pull up to create a small gap, and insert an opening pick. Slide the pick around all sides to sever the glue.
- 4
Remove the Back Cover
2 minLift the plastic back cover off the chassis and set it aside carefully.
- 5
Unscrew the Upper Shield
4 minUse a Phillips #00 screwdriver to remove all securing screws from the top motherboard plastic cover.
- 6
Remove the Motherboard Frame
3 minInsert a spudger beneath the plastic upper frame edge and pry upward to release the plastic retention clips.
- 7
Disconnect the Battery Cable
2 minPry the battery press connector straight up off the logic board using a non-conductive plastic spudger.
- 8
Disconnect the Main Flex Cables
3 minUnsnap the display ribbon cable and the lower sub-board interconnect cable from their motherboard sockets.
- 9
Detach the Coaxial Antenna Cables
2 minGently pry up the heads of the black and white coaxial antenna cables from the logic board terminals using fine tweezers.
- 10
Remove the Camera Modules
4 minDisconnect the front and rear camera connectors from the motherboard and lift each sensor out of the housing.
- 11
Lift Out the Logic Board
3 minInsert a spudger under the corner of the logic board and gently pry it out of the plastic chassis frame.
- 12
Clean Damaged Solder Joints
12 minApply liquid flux to the target circuit trace and clear old solder or corrosion using desoldering braid and a heated iron tip.
- 13
Solder Replacement Micro-Components
15 minPosition replacement surface-mount components with tweezers under magnification and solder the leads cleanly using fine wire.
- 14
Reseat the Logic Board
3 minAlign the logic board with the upper chassis recess and lower it into place, making sure flex cables remain unclipped beneath it.
- 15
Reconnect Internal Cables and Battery
5 minSnap all camera connectors, display flexes, antenna leads, and the main battery connector firmly back into their terminals.
- 16
Reinstall Cover and Screws
4 minPress the plastic motherboard shield back onto the chassis until it snaps into place, then secure all Phillips #00 screws tightly.
After your Motorola Moto G73 logic board repair
Power the Moto G73 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 G73 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 G73 repair context in the encyclopedia, or open related DIY guides.
