Phone · Motorola · Moto E40
Motorola Moto E40 Microphone Repair
Microphone Repair guide for the Motorola Moto E40
Before you begin
Tools
- Phillips #000 screwdriver
- SIM eject tool
- Plastic prying tools
- Spudger tool
- Tweezers
- Anti-static wrist strap
Parts / materials
- Replacement Moto E40 microphone daughterboard
- Adhesive tape for sub-board
Safety
- Power off the device completely before starting any work.
- Disconnect the battery press connector before touching internal electronics to avoid short circuits.
- Wear an anti-static wrist strap to protect delicate micro-chips from electrostatic discharge.
Overview
Step-by-step
- 1
Remove SIM tray
1 minInsert the SIM eject tool into the small hole beside the SIM card tray on the left side of the phone. Push inward firmly to eject the tray, then slide it completely out.
- 2
Unclip back cover
5 minInsert a plastic opening pick into the seam between the screen frame and back cover near the SIM slot. Slide the pick around the perimeter to release the plastic clips.
- 3
Disconnect fingerprint sensor
2 minSlightly lift the back cover, taking care not to strain the ribbon cable. Use a spudger to press off the fingerprint reader connector from the motherboard.
- 4
Remove upper shield screws
3 minUse a Phillips #000 screwdriver to remove the screws holding the plastic upper motherboard cover in place.
- 5
Lift off upper shield
2 minInsert a spudger under the edge of the upper plastic motherboard cover and gently pry it off the device.
- 6
Disconnect battery cable
1 minUse the flat end of a plastic spudger to pry the battery flex cable directly up from its socket on the motherboard.
- 7
Remove speaker housing screws
3 minUse your Phillips #000 screwdriver to remove all screws securing the lower loudspeaker assembly at the bottom of the phone.
- 8
Remove speaker housing
2 minInsert a spudger beneath the corner of the loudspeaker module and lift it up out of the frame.
- 9
Disconnect main flex cable
2 minPry up the lower connection of the main interconnect flex cable from the sub-board using a spudger.
- 10
Disconnect antenna cable
2 minUse tweezers to carefully pry up the head of the white coaxial antenna cable from its terminal on the sub-board.
- 11
Pry out sub-board
3 minInsert a flat spudger under the microphone sub-board and lift it carefully off the adhesive holding it to the chassis.
- 12
Install new sub-board
2 minAlign the replacement sub-board with the bottom compartment and press it down into place.
- 13
Connect antenna cable
2 minUse tweezers to position the coaxial antenna cable head over its socket on the sub-board and press down gently until it snaps into place.
- 14
Connect main flex cable
2 minAlign the main interconnect cable connector over the socket on the sub-board and press down firmly until it clicks.
- 15
Reinstall speaker housing
3 minPlace the loudspeaker housing back over the sub-board and secure it with the Phillips screws removed earlier.
- 16
Reconnect battery cable
1 minPress the battery flex connector straight down into its motherboard socket until it clicks.
- 17
Attach back cover
4 minReconnect the fingerprint reader cable, snap the upper shield back on with its screws, and firmly press the back cover onto the phone frame around all edges.
After your Motorola Moto E40 microphone repair
Power the Moto E40 back on and test the microphone 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 E40 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 E40 repair context in the encyclopedia, or open related DIY guides.

