iPhone 18 Pro Logic Board (without mmWave Antenna)
Before You Begin
Warning
Read Battery Safety and follow workspace and battery handling guidelines before you begin.
Remove the following parts before you begin:
Tools
Crosshead 44 mm half-moon bit
ESD-safe tweezers
Nitrile or lint-free gloves
Nylon probe (black stick)
Torque driver (black, 0.35 kgf cm)
Torque driver (green, 0.45 kgf cm)
Trilobe 44 mm half-moon bit
Refer to a full list of tools required for all repairs.
Caution
This procedure requires System Configuration. After you’ve completed all removal and reassembly steps, follow the instructions to initiate System Configuration.
Removal
Note: If you’ve already completed the removal steps, skip to reassembly.
Use a torque driver and the trilobe bit to remove two trilobe screws from the upper antenna 2 flex cable. Then complete the entire step before continuing to the next step.
Important: Note the orientation of the grounding spring before you remove the screws. Then remove the grounding spring and save it for reassembly.
Lift the ends of six flex cables (1-6) from their connectors.
Lift the end of the LiDAR flex cable from the connector and move it to the left.
Slowly tilt the logic board (with upper antenna flex cable) as shown, moving the LiDAR flex cable and other flex cables out of the way as necessary.
- Caution: Avoid pinching or touching the flex cables to other parts as you tilt the logic board.
Use a torque driver and the crosshead bit to remove one crosshead screw from the back glass connector cowling. Remove the back glass connector cowling and save it for reassembly. Then complete the entire step.
- Caution: The screw and cowling may fall into the enclosure. Ensure that you remove both before you continue.
Lift the end of the back glass flex cable off the connector on the back side of the logic board. Then place the logic board on a clean, flat surface.
Reassembly
Screw location diagram
Hold the logic board at 90 degrees as shown. Press the end of the back glass flex cable to the connector on the back side of the logic board.
Position the back glass connector cowling over the end of the back glass flex cable. Hook the cowling over the end of the flex cable.
Caution: Ensure that the cowling tab is engaged before installing the screw.
Use the black torque driver and crosshead bit to install one new crosshead screw (923-15881) (M3) into the back glass connector cowling.
Tilt the logic board into the enclosure, moving cables out of the way as necessary.
- Caution: Ensure that the upper antenna flex cable (connected to the logic board) sits under the LiDAR flex cable.
Press the ends of seven flex cables (1-7) to their connectors.
Important: Ensure that all seven flex cables are properly seated to their connectors.
Use the green torque driver and trilobe bit to install one new trilobe screw (923-15907) (M1) into the LiDAR flex cable grounding clips.
Position the grounding spring and ensure that it faces toward the camera.
- Caution: Ensure that the grounding spring is correctly positioned before fully installing the screw.
Use the green torque driver and trilobe bit to install one new trilobe screw (923-15907) (M2) into the grounding spring.
Reinstall the following parts to complete reassembly:
Caution
System Configuration is required if you’ve installed a replacement logic board. Disregard notifications about iPhone features on the Lock Screen until you complete configuration.
After you’ve completed all removal and reassembly steps, initiate System Configuration by putting the device into diagnostics mode. Tap Start Session and follow the onscreen prompts.
You’ll have one attempt to complete System Configuration. If the attempt is interrupted, canceled, or encounters an error, the device will display a message instructing you to contact the Self Service Repair Store team for assistance.