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Apple iPhone 12 Pro Logic Board Repair

Logic Board Repair guide for the Apple iPhone 12 Pro

Difficult
~77 min
18 steps

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

# Apple iPhone 12 Pro Logic Board Repair Repair Guide Action-specific logic board repair walkthrough for the Apple iPhone 12 Pro. About 77 minutes across 18 steps. This DIY guide walks through logic board repair on the Apple iPhone 12 Pro (iPhone series phone). Before you open the device, confirm the exact model number on the Apple settings screen or rear housing so your replacement part matches the iPhone 12 Pro specifically—not a similar iPhone sibling. Most DIY techs finish this Apple iPhone 12 Pro logic board repair in about 77 minutes when parts and tools are ready. Difficulty is rated advanced for this model. Recommended tools for this Apple iPhone 12 Pro job: P2 Pentalobe screwdriver, Y000 Tri-point screwdriver, Phillips #000 screwdriver, Suction handle, Opening picks, Heat gun or iOpener, Precision tweezers, Plastic spudger. Parts and supplies: Display assembly adhesive seal, Rosin solder flux, Lead-free solder wire, 99% Isopropyl alcohol. Power the iPhone 12 Pro off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Apple iPhone 12 Pro, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle logic board repair for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Power off device and remove Pentalobe screws

    2 min

    Power down your iPhone 12 Pro completely. Unscrew the two 6.7 mm P2 Pentalobe screws located on either side of the Lightning port.

  2. 2

    Heat display edges

    3 min

    Apply a heated iOpener or heat gun to the lower edge of the display for two minutes to soften the waterproof adhesive.

  3. 3

    Attach suction cup

    2 min

    Place a suction cup on the lower half of the screen and pull up firmly to create a small gap at the bottom seam.

  4. 4

    Insert opening pick

    2 min

    Slide a plastic opening pick into the gap between the display assembly and the outer frame at the bottom edge.

  5. 5

    Slice display adhesive

    4 min

    Slide the pick around the left and right edges to slice through the adhesive seal, stopping before the top edge.

  6. 6

    Open display panel

    2 min

    Swing the display open from the left edge toward the right side like a book, resting it against a sturdy object.

  7. 7

    Remove lower cover plate

    3 min

    Unscrew the four Y000 tri-point screws securing the lower metal bracket over the battery and screen connectors, then lift it out.

  8. 8

    Disconnect battery press connector

    2 min

    Use a plastic spudger to gently pry the battery connector straight up from its logic board socket.

  9. 9

    Disconnect display cables

    3 min

    Pry up the OLED panel connector and digitizer cable connector from the logic board using a spudger.

  10. 10

    Disconnect front sensor array

    4 min

    Unscrew the upper shield plate screws, then disconnect the earpiece speaker and sensor assembly cable to separate the display completely.

  11. 11

    Eject SIM tray

    1 min

    Insert a SIM eject tool into the pinhole on the side of the iPhone frame to push out the SIM card tray.

  12. 12

    Unbolt rear camera shield

    4 min

    Remove the protective bracket over the rear camera module and pry up all three camera connectors from the board.

  13. 13

    Disconnect internal antenna and port flex cables

    5 min

    Gently disconnect the charging port, wireless charging coil, and 5G antenna flex cables attached to the logic board edges.

  14. 14

    Remove logic board screws

    4 min

    Unscrew the standoff screws and Phillips fasteners securing the logic board assembly to the rear chassis.

  15. 15

    Lift logic board from chassis

    3 min

    Carefully pivot the logic board up from the bottom end and slide it clear of the internal frame.

  16. 16

    Perform soldering repair on board

    15 min

    Apply liquid flux and micro-solder the damaged traces, surface-mount components, or sandwich layers using a fine-tip iron.

  17. 17

    Reinstall board and reconnect flex cables

    8 min

    Lower the logic board back into position, secure all standoff screws, and firmly press all flex connectors back onto their sockets.

  18. 18

    Apply fresh display adhesive and reassemble

    10 min

    Clean 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.

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