Phone · Motorola · G9 Plus
Motorola G9 Plus Logic Board Repair
Logic Board Repair guide for the Motorola G9 Plus
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Magnifying glass or headlamp
- Soldering iron
- Heat gun
- SIM card eject tool
Parts / materials
- Flux
- Desoldering braid
- Isopropyl alcohol (99%)
- Lint-free wipes
- B-7000 frame adhesive
Safety
- Wear an anti-static wrist strap connected to a grounded surface to prevent static damage to sensitive micro-components.
- Perform soldering and reflow procedures in a well-ventilated space to avoid inhaling chemical fumes.
- Wear protective safety glasses to guard against hot flux splatter.
Overview
Step-by-step
- 1
Turn off device
2 minPower down the Motorola G9 Plus completely and remove the SIM card tray using an eject pin.
- 2
Heat back cover
3 minApply heat evenly to the rear glass panel for 2 to 3 minutes using a heat gun to soften the adhesive.
- 3
Slice rear adhesive
5 minInsert a thin plastic opening pick under the lower edge and slice along all four sides to separate the back cover.
- 4
Disconnect fingerprint sensor
2 minSlightly tilt open the back cover and use tweezers to detach the fingerprint sensor flex cable from the board.
- 5
Unscrew top bracket
4 minRemove the Phillips #00 screws securing the plastic motherboard bracket to the main chassis.
- 6
Remove motherboard shield
2 minPry up and lift the plastic protective cover off the top section of the phone frame.
- 7
Disconnect battery cable
1 minUse a plastic spudger to pry the battery connector directly up and disconnect it from the logic board.
- 8
Disconnect display and sub-board cables
2 minUnplug the main display press connector and the bottom sub-board interconnect ribbon cable from the logic board.
- 9
Disconnect antenna cables
2 minCarefully pry up the black and white coaxial antenna connectors using fine-tipped tweezers.
- 10
Remove camera modules
3 minDisconnect and carefully extract the front and rear camera modules from the logic board to protect them from heat.
- 11
Unfasten motherboard screws
2 minRemove the remaining Phillips screws holding the logic board down to the phone housing.
- 12
Lift out logic board
2 minGently lift the logic board from its top edge and tilt it out of the rear housing.
- 13
Inspect board under magnification
5 minPlace the board under a magnifying glass or headlamp to check for broken solder joints or damaged components.
- 14
Apply flux and reflow
12 minApply liquid flux to the targeted pads, then use a soldering iron and desoldering braid to clear bad solder or seat new components.
- 15
Clean logic board
3 minWipe away remaining flux residue using high-concentration isopropyl alcohol and a lint-free swab.
- 16
Reinstall motherboard
3 minPosition the logic board back into the frame and gently press it down into place before reattaching screws.
After your Motorola G9 Plus logic board repair
Power the G9 Plus 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 G9 Plus 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 G9 Plus repair context in the encyclopedia, or open related DIY guides.
