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iPhone 16 Pro Max Logic Board Replacement

This guide shows how to remove and replace the...

Apple iPhone 16 Pro Max Difficult 1 - 3 hours Guide 178681
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Guide overview

Before you begin

This guide shows how to remove and replace the logic board for your iPhone 16 Pro Max. The logic board has connectors on its top and bottom, so you may need to remove the screen to complete the repair. This procedure will attempt to connect the logic board without removing the screen first. If you remove the screen, you'll also need screen adhesive. You'll need replacement back glass adhesive to complete this repair. After your repair, calibrate authentic Apple replacement components using Repair Assistant.

Step 1

Before you begin

  • Allow your iPhone's battery to drain below 25%, as a charged lithium-ion battery is a potential safety hazard.
  • Unplug any cables from your iPhone.
  • Hold the power and either volume buttons, and slide to power off your iPhone.
Step 2

Tape over any cracks

  • If your screen or back glass is badly cracked, lay overlapping strips of packing tape over the glass to protect yourself and make disassembly easier.
  • Make sure there's a smooth area near the bottom edge that's big enough for a suction cup to stick to.
Step 3

Remove the pentalobe screws

  • Use a P2 pentalobe driver to remove the two 7.4 mm-long screws on either side of the charge port.
Step 4

Mark your opening picks

  • If inserted too far, an opening pick can damage your device. Follow this step to mark your pick and prevent damage.
  • Measure 3 mm from the tip and mark the opening pick with a permanent marker.
  • You can also mark the other corners of the pick with different measurements.
  • Alternatively, tape a coin to a pick 3 mm from the tip.
Step 5

Create a gap using a suction handle

  • The next two steps show how to create an initial gap using a suction handle.
  • Use a hair dryer or heat gun to heat the bottom edge of the back glass until it's hot to the touch.
  • You can also use an iOpener to heat the back glass. Follow these instructions to heat and apply the iOpener properly.
Step 6

Repair step

  • Apply a suction handle to the bottom edge of the back glass.
  • Pull up on the handle with strong, steady force to create a gap between the back glass and the frame.
  • If a gap doesn't appear, apply more heat to the edge and try again.
  • Insert the tip of an opening pick into the gap.
Step 7

Back glass information

  • As you slice the adhesive securing the back glass in the following steps, don't insert your pick deeper than 3 mm to avoid damaging the following areas:
  • A delicate cable connecting the back glass to the iPhone, right next to the volume up button. Don't insert your pick here to avoid slicing the cable.
  • Multiple spring contacts around the perimeter of the iPhone.
Step 8

Separate the bottom edge adhesive

  • Slide the opening pick along the bottom edge to slice the adhesive.
  • If the adhesive feels difficult to slice, reheat the edge for a minute and try again.
  • Leave the opening pick in the bottom-left corner to prevent the adhesive from resealing.
Step 9

Heat the left edge

  • Use a hair dryer or heat gun to heat the left edge of the back glass until it's hot to the touch.
Step 10

Separate the left adhesive

  • Insert a second opening pick into the bottom-left corner, close to the existing pick.
  • Don't insert your pick deeper than 3 mm to avoid damaging the spring contacts.
  • Slide your pick along the left edge to separate the adhesive and release the metal clips.
  • You'll hear and feel the metal clips release as you pass them.
  • Leave this pick inserted in the top-left corner to prevent the adhesive from resealing.
Step 11

Heat the top edge and corner

  • Use a hair dryer or heat gun to heat the top edge and top-right corner of the back glass until it's hot to the touch.
Step 12

Separate the top adhesive

  • Don't insert your pick deeper than 3 mm to avoid damaging the spring contacts.
  • Insert a third opening pick into the top-left corner.
  • Slide the opening pick along the top edge and around the top-right corner, stopping above the volume up button.
  • Leave this pick inserted to prevent the adhesive from resealing.
Step 13

Heat the right edge

  • Use a hair dryer or heat gun to heat the right edge of the back glass until it's hot to the touch.
Step 14

Separate the right adhesive

  • Don't insert your pick deeper than 3 mm to avoid damaging the spring contacts.
  • Insert a fourth opening pick into the bottom-right corner.
  • Slide the opening pick around the corner and up the right edge, stopping below the volume down button.
  • Leave this pick inserted to prevent the adhesive from resealing.
Step 15

Reposition the back glass

  • At this point, the back glass should be free from the frame. If the back glass feels stuck, go back around the perimeter with your pick to check for missed sections of adhesive or stuck clips.
  • Swing open the back glass to the right of the iPhone to separate the remaining adhesive.
  • Support the back glass with a clean, sturdy object.
Step 16

Remove the battery connector cover

  • Use a tri-point Y000 driver to remove the three screws securing the battery connector cover:
  • Two 1.3 mm‑long screws
  • One 1.0 mm‑long screw
Step 17

Repair step

  • Lift and remove the battery connector cover.
Step 18

Disconnect the battery

  • Use the point of a spudger to pry up and disconnect the battery press connector.
Step 19

Remove the back glass connector cover

  • Use a tri-point Y000 driver to remove the four screws securing the back glass connector cover:
  • Two 1.3 mm‑long screws
  • Two 1.0 mm‑long screws
Step 20

Repair step

  • Lift the back glass connector cover straight up and remove it.
Step 21

Remove the back glass

  • Use the point of a spudger to pry up and disconnect the back glass connector.
Step 22

Repair step

  • Remove the back glass.
Step 23

Remove the earpiece speaker

  • Use the point of a spudger to pry up and disconnect the earpiece speaker and 5G mmWave antenna press connectors.
Step 24

Repair step

  • Remove the six screws securing the earpiece speaker:
  • One 2.4 mm‑long Phillips screw
  • Three 1.3 mm‑long Phillips screws
  • One 1.6 mm‑long Phillips screw
  • One 3.3 mm‑long standoff screw
  • Standoff screws are best removed using a dedicated standoff driver or driver bit. In a pinch, a small flathead screwdriver will do the job—but use extra caution to ensure it doesn't slip and damage surrounding components.
Step 25

Repair step

  • Use tweezers to lift and remove the earpiece speaker.
  • You may feel some resistance near the top edge, where the speaker gasket seals against the frame. Pull the speaker out gently to release the seal.
Step 26

Disconnect the logic board

  • Use a spudger to pry up and disconnect the seven silver press connectors from the top of the logic board.
Step 27

Repair step

  • Use a spudger to pry up and disconnect the three black press connectors from the logic board.
Step 28

Repair step

  • Use a standoff driver to remove the four screws securing the logic board:
  • Two 4.5 mm‑long screws
  • One 3.4 mm‑long screw
  • One 4.2 mm‑long screw
Step 29

Display connector information

  • This image shows the display connector underneath the logic board. The next two steps show how to disconnect this connector from the bottom of the logic board.
Step 30

Remove the logic board

  • If your iPhone has a physical SIM tray, eject it before you proceed.
  • Make sure all the connectors are disconnected from the top of the logic board.
  • Insert the flat edge of an opening pick between the battery and the left edge of the logic board. Hold the pick in place with your fingers.
  • Insert the flat end of a spudger underneath the right edge of the logic board.
  • Gently pry with the spudger to lift the logic board and disconnect the display connector.
  • Don't remove the logic board yet. There's still a cable connected to the bottom side.
Step 31

Repair step

  • Flip the logic board over, being careful not to strain the connected cable.
  • Use the point of a spudger to pry up and disconnect the front sensor connector from the bottom side of the logic board.
Step 32

Repair step

  • Remove the logic board.
Step 33

Disassembly complete

  • Congratulations on completing disassembly! The remaining steps will show how to reassemble your iPhone.
  • Depending on your iPhone model, some reassembly photos may have minor visual discrepancies. The procedure, however, will be correct for your iPhone.
Step 34

Connect the front sensor cable

  • Hold the logic board so that the front sensor cable is close to its connector.
  • Align the front sensor cable connector carefully over its logic board socket.
  • Use the point of a spudger or your finger to press the connector until it clicks into place.
  • Don't try to force the connector into place. If you're having trouble, reposition it and try again.
Step 35

Lay the logic board in place

  • Gently bend all the loose press connectors out of the way so you can lay the logic board in place.
  • Lay the logic board in its recess.
Step 36

Install the logic board

  • You can't directly connect the display connector to the bottom of the logic board without removing the screen, but you might successfully connect it by screwing the logic board in place. Be sure to test your iPhone before you seal it up.
  • Make sure the logic board rests in place against its screw posts. The posts will properly align the board to the display connector underneath it.
Step 37

Repair step

  • Use a standoff driver to install the four screws securing the logic board:
  • Two 4.5 mm‑long screws
  • One 3.4 mm‑long screw
  • One 4.2 mm‑long screw
Step 38

Repair step

  • Use your finger or a spudger to press and connect the three black press connectors onto the logic board.
  • To re-attach press connectors like these, carefully align and press down on one side until it clicks into place, then repeat on the other side. Don't press down in the middle. If the connector is misaligned, the pins can bend, causing permanent damage.
Step 39

Repair step

  • Use your finger or a spudger to press and connect the seven silver press connectors onto the logic board.
Step 40

Install the earpiece speaker

  • Align the top edge of the earpiece speaker with the top edge of the frame.
  • Lay the earpiece speaker into its recess.
  • You may need to push the speaker towards the top edge of the frame to seat it properly.
Step 41

Repair step

  • Install the six screws securing the earpiece speaker:
  • One 2.4 mm‑long Phillips screw
  • Three 1.3 mm‑long Phillips screws
  • One 1.6 mm‑long Phillips screw
  • One 3.3 mm‑long standoff screw
Step 42

Repair step

  • Use your finger or a spudger to press and connect the earpiece speaker and the mmWave connectors onto the logic board.
Step 43

Remove the leftover adhesive

  • Work around the fragile grounding clips as you're cleaning the frame. If you bend one out of place, gently bend it back with your fingers or tweezers.
  • Use blunt nose tweezers or your fingers to remove large pieces of adhesive from the frame perimeter.
  • Use a spudger to scrape the adhesive residue off of the frame.
  • If the adhesive feels stubborn, apply some heat using a hair dryer or heat gun and try again.
Step 44

Clean the back glass

  • If you're reusing your back glass, apply a few drops of highly-concentrated isopropyl alcohol (over 90%) to a microfiber or lint-free cloth and wipe around the perimeter to prepare the surface for new adhesive.
Step 45

Clean the frame

  • Wrap a lint-free cloth or a coffee filter over the point of a spudger and apply a few drops of highly-concentrated isopropyl alcohol (over 90%) to it.
  • Wipe in one direction along the perimeter of the frame to clean the adhesive residue.
  • Take your time doing this. A clean frame allows replacement adhesive to lay evenly, ensuring a better bond.
Step 46

Apply the replacement adhesive

  • Lay the adhesive sheet over the frame to determine its proper orientation.
  • Use features such as the camera cutout and notches along the top and bottom edges to visualize how the adhesive will lay in the frame.
Step 47

Repair step

  • Grab the tab in the corner of the adhesive sheet and peel the liner to expose a third of the adhesive.
  • The exposed adhesive is very sticky. Don't let it touch anything until you're ready to apply it to the frame.
  • If your adhesive has multiple liners, peel the liner that exposes the side that sticks to the frame.
Step 48

Repair step

  • Carefully align the exposed edge of the adhesive strip with the corresponding edge of the iPhone's frame.
  • Once the adhesive is pressed into place, you can't reposition it—you'll have to remove it and start over with new adhesive.
  • When it's correctly aligned, gently press the exposed adhesive strip onto the frame.
Step 49

Repair step

  • Continue peeling away the liner from the adhesive, gently pressing the adhesive into place.
  • If you've correctly aligned the adhesive, the edges will fall perfectly into place.
  • If your adhesive is slightly misaligned, gently pull the long edges into alignment with the frame.
  • If the adhesive begins to crease or wrinkle, remove it and start over with fresh adhesive.
  • If you don't have another set of adhesive strips handy, it's okay to temporarily put your iPhone back together and use it normally without any adhesive. Just keep in mind that your iPhone's water resistance will be compromised until you replace the adhesive.
Step 50

Repair step

  • Use a spudger to press the adhesive around the entire perimeter of your iPhone.
  • Work around the fragile grounding clips. If you bend one out of place, gently bend it back with your fingers or tweezers.
  • Don't press too hard, or you'll stretch and deform the adhesive.
Step 51

Repair step

  • Use a spudger or your fingers to lift the pull tab connected to the large front liner. The pull tab is often in a corner of the liner.
  • Use the pull tab to peel off the large front liner from the adhesive.
  • At this point, you may still have a liner covering the perimeter, which prevents the adhesive from accidentally sticking to anything while you're reassembling your iPhone. Don't remove these small release liners just yet.
Step 52

Connect the back glass

  • Prop up the back glass along the right edge of your iPhone.
Step 53

Repair step

  • Use your finger or the flat end of a spudger to press and connect the back glass connector onto the logic board.
Step 54

Connect the battery

  • Use your finger or a spudger to press and connect the battery press connector onto the logic board.
  • This is a good point to test your repair before sealing up your iPhone. Power on your iPhone and make sure it works as expected. Power it back down and continue reassembly.
  • If your iPhone doesn't turn on, connect it to a power source and try again.
  • If you've replaced the logic board and the screen fails to turn on, you'll need to follow the screen guide to manually connect the display connector.
Step 55

Install the connector covers

  • Align the back glass connector cover by its screw holes and lay it in place.
Step 56

Repair step

  • Use a tri-point Y000 driver to install the four screws securing the back glass connector cover:
  • Two 1.3 mm‑long screws
  • Two 1.0 mm‑long screws
Step 57

Repair step

  • Align the battery connector cover by its screw holes and lay it in place.
Step 58

Repair step

  • Use a tri-point Y000 driver to install the three screws securing the battery connector cover:
  • Two 1.3 mm‑long screws
  • One 1.0 mm‑long screw
Step 59

Remove the final adhesive liners

  • Use your fingers or a spudger to peel away all perimeter liners, exposing the adhesive.
  • As you remove the liners, make sure nothing touches the exposed adhesive.
  • Check the frame and back glass for any stray liners and remove them. There should be no liners remaining.
Step 60

Install the back glass

  • Lower the back glass onto the frame, beginning with the top edge.
  • If you feel resistance, a perimeter clip may have bent out of place and is being crushed by the frame. Look at the point of resistance and gently straighten any bent clips.
  • Press along the edges of the iPhone until the back glass sits flush against the frame.
Step 61

Apply heat to the perimeter

  • Use a hair dryer, heat gun, or an iOpener to heat the back glass perimeter until it's slightly too hot to touch.
  • The heat softens the adhesive and helps create a better bond.
Step 62

Apply pressure to the perimeter

  • Use your fingers to firmly squeeze around the perimeter of the iPhone.
Step 63

Repair step

  • Place your iPhone screen-side down on a clean, flat work surface.
  • Lay a strip of tape around the perimeter of the back glass to protect the finish.
  • Stack coins around the perimeter of the back glass until you create a wall that's as tall as the rear camera protrusions.
  • Alternatively, you can use vise clamps around the perimeter of your device to set the new adhesive.
Step 64

Repair step

  • Place 3-4 heavy books squarely on top of your iPhone.
  • The coins may leave a slight impression on the bottom book cover, so don't use anything valuable.
  • Leave the books in place for about 30 minutes.
  • The pressure will help activate the adhesive.
Step 65

Install the pentalobe screws

  • Use a P2 pentalobe driver to install the two 7.4 mm-long screws on either side of the charge port.