Phone · Apple · iPhone 12 Pro
Apple iPhone 12 Pro Logic Board Repair
Logic Board Repair guide for the Apple iPhone 12 Pro
Before you begin
Tools
- P2 Pentalobe screwdriver
- Y000 Tri-point screwdriver
- Phillips #000 screwdriver
- Suction handle
- Opening picks
- Heat gun or iOpener
- Precision tweezers
- Plastic spudger
- SIM eject tool
- Fine-tip soldering iron
Parts / materials
- Display assembly adhesive seal
- Rosin solder flux
- Lead-free solder wire
- 99% Isopropyl alcohol
Safety
- Disconnect the battery before touching any logic board components to prevent short circuits.
- Wear safety glasses and work in a well-ventilated area when soldering.
- Avoid heating the battery directly to prevent thermal runaway or rupture.
Overview
Step-by-step
- 1
Power off device and remove Pentalobe screws
2 minPower down your iPhone 12 Pro completely. Unscrew the two 6.7 mm P2 Pentalobe screws located on either side of the Lightning port.
- 2
Heat display edges
3 minApply a heated iOpener or heat gun to the lower edge of the display for two minutes to soften the waterproof adhesive.
- 3
Attach suction cup
2 minPlace a suction cup on the lower half of the screen and pull up firmly to create a small gap at the bottom seam.
- 4
Insert opening pick
2 minSlide a plastic opening pick into the gap between the display assembly and the outer frame at the bottom edge.
- 5
Slice display adhesive
4 minSlide the pick around the left and right edges to slice through the adhesive seal, stopping before the top edge.
- 6
Open display panel
2 minSwing the display open from the left edge toward the right side like a book, resting it against a sturdy object.
- 7
Remove lower cover plate
3 minUnscrew the four Y000 tri-point screws securing the lower metal bracket over the battery and screen connectors, then lift it out.
- 8
Disconnect battery press connector
2 minUse a plastic spudger to gently pry the battery connector straight up from its logic board socket.
- 9
Disconnect display cables
3 minPry up the OLED panel connector and digitizer cable connector from the logic board using a spudger.
- 10
Disconnect front sensor array
4 minUnscrew the upper shield plate screws, then disconnect the earpiece speaker and sensor assembly cable to separate the display completely.
- 11
Eject SIM tray
1 minInsert a SIM eject tool into the pinhole on the side of the iPhone frame to push out the SIM card tray.
- 12
Unbolt rear camera shield
4 minRemove the protective bracket over the rear camera module and pry up all three camera connectors from the board.
- 13
Disconnect internal antenna and port flex cables
5 minGently disconnect the charging port, wireless charging coil, and 5G antenna flex cables attached to the logic board edges.
- 14
Remove logic board screws
4 minUnscrew the standoff screws and Phillips fasteners securing the logic board assembly to the rear chassis.
- 15
Lift logic board from chassis
3 minCarefully pivot the logic board up from the bottom end and slide it clear of the internal frame.
- 16
Perform soldering repair on board
15 minApply liquid flux and micro-solder the damaged traces, surface-mount components, or sandwich layers using a fine-tip iron.
- 17
Reinstall board and reconnect flex cables
8 minLower the logic board back into position, secure all standoff screws, and firmly press all flex connectors back onto their sockets.
- 18
Apply fresh display adhesive and reassemble
10 minClean off old adhesive, lay down a new perimeter seal, reconnect the display and battery, and fasten the enclosure screws.
After your Apple iPhone 12 Pro logic board repair
Power the iPhone 12 Pro 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 Apple iPhone 12 Pro job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Apple iPhone 12 Pro repair context in the encyclopedia, or open related DIY guides.

