Phone · LG · V20 Mini
Power Button Repair Guide for V20 Mini
Power Button Repair guide for the LG V20 Mini
Before you begin
Tools
- Heat gun or hair dryer
- Precision screwdriver set (Phillips #000)
- Plastic prying tools
- Suction cup tool
- Tweezers
- Spudger tool
- Opening picks
Parts / materials
- Replacement power button flex cable
- Pre-cut back cover adhesive
- Isopropyl alcohol (99%)
Safety
- Wear an anti-static wrist strap to prevent static damage to sensitive circuitry.
- Do not bend or puncture the lithium-ion battery while working inside the frame.
- Allow the device to cool if it gets uncomfortably hot while heating the rear glass.
Overview
Step-by-step
- 1
Power Off Phone
1 minPress and hold the power button, then select Power Off on the screen. Ensure the device is completely powered down before proceeding.
- 2
Eject SIM Tray
1 minInsert a SIM eject tool into the small hole on the SIM tray slot. Press firmly to pop the tray out, then slide it out completely.
- 3
Heat Rear Cover
2 minApply heat from a heat gun on low power along the outer edges of the rear panel for two minutes. This softens the perimeter waterproof adhesive.
- 4
Attach Suction Cup
1 minPlace a suction cup near the bottom edge of the glass back cover. Pull upward on the ring gently to create a slight gap along the seam.
- 5
Insert Opening Pick
1 minSlide a plastic opening pick into the gap created between the glass rear cover and the frame. Do not insert it more than 3 mm to avoid internal damage.
- 6
Slice Rear Adhesive
3 minSlide the pick around all four perimeter edges of the phone to cut through the sticky seal. Apply extra heat if you encounter strong resistance.
- 7
Remove Rear Panel
1 minLift the rear panel off the chassis once all adhesive is sliced. Set the glass panel aside on a soft, clean surface.
- 8
Unscrew Midframe Screws
3 minUse a Phillips #000 screwdriver to remove the 10 screws securing the plastic midframe. Organize the screws in a tray so none are lost.
- 9
Pry Off Midframe Shield
2 minInsert a plastic spudger into the notch on the midframe perimeter. Carefully pry up to release the plastic clips and remove the shield.
- 10
Disconnect Battery Flex
1 minPry the battery press connector straight up from its motherboard socket using a spudger. Disconnecting the battery prevents accidental electrical shorts.
- 11
Disconnect Display Flex
2 minUse the flat end of a spudger to detach the main display and digitizer flex cables from the upper motherboard.
- 12
Remove Motherboard Screws
1 minUnscrew the single Phillips #000 screw holding the motherboard to the top frame assembly.
- 13
Remove Motherboard
2 minGently lift the motherboard from the bottom edge and remove it from the frame. Set it on an anti-static mat.
- 14
Peel Power Button Flex
2 minUse fine tweezers to gently peel the damaged power button flex cable away from the inner side rail. Clean off old adhesive residue using isopropyl alcohol.
- 15
Install New Power Flex
2 minAlign the new power button flex key with the frame notch and press it down to stick. Ensure the contact pads lie flat against the recessed channel.
- 16
Reinstall Motherboard
2 minCarefully lower the motherboard back into place, taking care not to trap any flex cables beneath it. Fasten the single Phillips screw.
- 17
Reconnect Connectors
2 minSnap the display flex connector and battery cable back into their respective motherboard sockets until they click firmly.
- 18
Secure Midframe Shield
3 minSnap the plastic midframe back onto the housing and reinstall the 10 Phillips #000 screws evenly.
- 19
Reseal Rear Cover
2 minApply a new pre-cut adhesive gasket along the frame border, press the rear panel onto the chassis, and hold firm pressure for 30 seconds.
After your LG V20 Mini power button repair
Power the V20 Mini back on and test the power button 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 LG V20 Mini job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more LG V20 Mini repair context in the encyclopedia, or open related DIY guides.

