Phone · OnePlus · Nord N300 5G
Power Button Repair Guide for Nord N300 5G
Power Button Repair guide for the OnePlus Nord N300 5G
Before you begin
Tools
- Heat gun or hair dryer
- Suction cup tool
- Plastic prying tools
- Phillips #000 screwdriver
- Spudger tool
- Tweezers
- SIM eject tool
Parts / materials
- Replacement power button flex cable
- Rear panel adhesive strip or B-7000 glue
- Isopropanol alcohol
Safety
- Always disconnect the battery before touching internal circuit components.
- Wear eye protection when heating and prying device covers.
- Do not bend, puncture, or apply pressure to the battery.
Overview
Step-by-step
- 1
Power off the device
1 minPress and hold the power and volume up buttons simultaneously, then tap Power Off. Ensure the device is completely powered down before starting.
- 2
Eject the SIM tray
1 minInsert a SIM eject tool into the hole on the left edge of the phone. Push firmly until the tray pops out, then remove it.
- 3
Heat the rear panel
2 minApply heat to the edges of the rear cover using a heat gun for two minutes. This softens the adhesive holding the back panel to the frame.
- 4
Attach a suction cup
1 minPress a suction cup onto the lower third of the rear panel. Pull upward gently to create a small gap near the USB-C port.
- 5
Slice the rear panel adhesive
3 minInsert a plastic prying pick into the gap created by the suction cup. Slide the pick around all four edges to slice through the adhesive.
- 6
Lift away the rear panel
1 minCarefully separate the rear cover from the chassis. Set the panel aside on a clean surface.
- 7
Unscrew the upper midframe cover
3 minUse a Phillips #000 screwdriver to remove all screws securing the plastic motherboard midframe cover. Keep track of all removed screws.
- 8
Unclip the midframe cover
2 minInsert a flat spudger under the edge of the upper midframe shield. Pry gently to unclip and remove the shield from the housing.
- 9
Disconnect the battery cable
1 minLocate the battery flex connector on the motherboard. Pry it straight up with a plastic spudger to cut power to the device.
- 10
Disconnect the power button flex cable
1 minFind the power button ribbon cable connector attached to the motherboard. Carefully unclip the press connector using a spudger.
- 11
Remove the power button bracket
2 minUnscrew or unhook the small metal bracket securing the power button flex to the inner frame. Remove the bracket with tweezers.
- 12
Peel up the old power button flex cable
2 minSlide precision tweezers under the damaged power button ribbon. Gently peel it off the adhesive strip inside the frame.
- 13
Position the new power button flex cable
2 minAlign the replacement power button flex cable into the frame recess. Press it firmly against the frame to set the adhesive backing.
- 14
Secure the power button bracket
2 minPosition the metal retaining bracket back over the power button assembly. Reinstall and tighten the screw or latch it in place.
- 15
Reconnect the power button flex cable
1 minAlign the press connector over its motherboard socket. Press down firmly until it snaps into position.
- 16
Reconnect the battery cable
1 minPress the battery connector firmly into its socket on the motherboard to restore power connections.
- 17
Reinstall the upper midframe cover
3 minPlace the plastic upper midframe cover over the motherboard and snap the perimeter clips shut. Drive all Phillips #000 screws back in place.
- 18
Resecure the rear panel
3 minApply fresh pre-cut adhesive or a thin bead of B-7000 glue to the frame perimeter. Align the rear panel and press firmly around all edges.
- 19
Reinsert the SIM tray
1 minSlide the SIM card tray back into its slot on the left edge until flush with the body. Power on the device to test the new power button.
After your OnePlus Nord N300 5G power button repair
Power the Nord N300 5G 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 OnePlus Nord N300 5G job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more OnePlus Nord N300 5G repair context in the encyclopedia, or open related DIY guides.

