Phone · OnePlus · Nord N20 5G
OnePlus Nord N20 5G Logic Board Repair
Logic Board Repair guide for the OnePlus Nord N20 5G
Before you begin
Tools
- Phillips #00 Screwdriver
- Plastic Opening Picks
- Suction Cup
- Plastic Spudger
- SIM Eject Tool
- Precision Tweezers
- Soldering Iron
- Magnifying Glass or Headlamp
Parts / materials
- Pre-cut back cover adhesive strips
- Rosin flux
- Desoldering braid
- 99% Isopropyl alcohol
Safety
- Wear an anti-static wrist strap connected to ground to prevent ESD damage.
- Disconnect the battery before attempting any board-level work.
- Operate soldering equipment in a well-ventilated space to avoid inhaling fumes.
Overview
Step-by-step
- 1
Eject SIM card tray
1 minInsert a SIM eject pin into the hole on the left edge of the phone to release and pull out the tray.
- 2
Heat rear panel adhesive
2 minApply a heat gun or heated pad around the outer edges of the back cover for two minutes to soften the glue.
- 3
Slice rear panel perimeter
3 minPress a suction cup near the bottom edge and slide an opening pick underneath to cut through the adhesive seal.
- 4
Remove rear cover
2 minSlice around all four edges with the pick and lift the plastic back cover off the chassis.
- 5
Unscrew upper motherboard cover
3 minRemove the Phillips #00 screws holding down the top plastic midframe and camera protection bracket.
- 6
Detach upper midframe shield
2 minWedge a plastic spudger under the motherboard shield edge and lift it clear of the frame.
- 7
Disconnect battery flex cable
1 minPry the battery connector directly up from its motherboard socket to kill all electrical power.
- 8
Disconnect main interconnect cables
2 minUnplug the display cable and lower sub-board ribbon cable press connectors from the logic board.
- 9
Disconnect camera modules
2 minPop off the press-fit connectors for the rear camera sensors and front selfie camera using a spudger.
- 10
Detach antenna coaxial cables
2 minGently pry up the black and white coaxial cable heads from their board sockets with precision tweezers.
- 11
Remove logic board retaining screw
1 minUnscrew the single remaining Phillips #00 screw locking the lower corner of the logic board to the frame.
- 12
Remove logic board
2 minCarefully pry under the upper edge of the logic board and lift it out from the phone chassis.
- 13
Inspect board under magnification
5 minExamine the board surface under a magnifying lamp to identify burned components, corrosion, or fractured solder joints.
- 14
Solder damaged board components
12 minApply flux and use a soldering iron or desoldering braid to replace damaged micro-components or repair broken traces.
- 15
Reseat logic board in housing
2 minLower the repaired logic board back into the chassis frame, aligning it precisely over the locator pegs.
- 16
Reconnect ribbon and coaxial cables
3 minPress all camera, interconnect, antenna coaxial, and battery connectors firmly back onto their sockets.
- 17
Reinstall motherboard midframe
3 minPosition the plastic upper shield back over the logic board and tighten all Phillips screws.
- 18
Seal rear cover
3 minApply new adhesive tape around the frame perimeter, align the back panel, and press down firmly.
After your OnePlus Nord N20 5G logic board repair
Power the Nord N20 5G 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 OnePlus Nord N20 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 N20 5G repair context in the encyclopedia, or open related DIY guides.
