We are back with a new replacement guide. Today we have the iPhone 15 Logic Board Replacement step-by-step guide. Maybe your iPhone 15 acts up or is not processing as it should. Replacing the malfunctioning logic board will retain the functionality of your iPhone 15. However you will need new replacement adhesive for the iPhone 15 screen and the back glass.
Although when you replace the logic board in an iPhone 15 it is not just about changing the part. Apple’s rules mean certain parts must match the new logic board to work properly. Even if you use a real/Original logic board. it will not work fully without pairing those parts. So to keep everything working you will also need to replace the screen (so True Tone and Auto-Brightness still work), the front camera and sensors (to keep camera and sensor features), and the battery (to show correct battery health). All these parts must be paired with the new logic board to function correctly.
Prepare Your iPhone 15 For Disassembling
*You must prepare your device before proceeding with the disassembling process of the iPhone 15 for logic board replacement.
*Firstly you need to remove all the cables and wires from your phone. While disassembling the phone, nothing should be plugged in.
*Also make sure that your phone is less than 25% charged. Otherwise it is more susceptible to catching fire if it is accidentally damaged.
*If your battery appears swollen it is important to take proper safety precautions. A swollen battery can be dangerous as it may lead to overheating, leaks, or even fire. To avoid potential harm to yourself or damage to your iPhone, avoid using the phone until the issue is addressed.
*You should also avoid pressing on the screen or case, as this can cause further damage. To ensure your phone remains safe and functional. It is best to consider replacing the swollen battery as soon as possible.
Required Tools For iPhone 15 Logic Board Replacement
*P2 Pentalobe Screwdriver iPhone
*Hair Dryer/Heat Gun
*Opening Picks
*Suction Handle
*Tri‑point Y000 Screwdriver
*Tweezers
*Spudger
*Phillips #000 Screwdriver
*Standoff Screwdriver for iPhones
*Isopropyl Alcohol
*Isopropyl Alcohol
*Replacement Part
These tools will help you proceed with your iPhone 15 logic board replacement. You also need to choose a calm place with enough lighting for the replacement.
Step #1. Switch Off iPhone 15
*Press and hold the side button (on the right side of the phone) and either volume button (on the left side) at the same time.
*When the “Slide to power off” slider appears on the screen please swipe it to the right.
*Your iPhone will turn off after a few seconds.
*This will fully power off your iPhone 15.
Step #2. Unfasten Pentalobe Screws and Remove Them
*You will need a P2 driver to open the two pentalobe screws on either side of the charging port.
*These screws are 7.7 mm long. Please remove and keep them in a secure place.
Step #3. Apply Heat on the Screen
*Firstly we need to remove the screen from the phone
*To separate the screen from the frame easily you need to apply heat to the screen.
*Use a heat gun or hair dryer for heating.
*Keep checking the phone’s screen with your hand until it gets too hot to touch.
*Don’t apply excessive heat because the battery is susceptible to catching fire.
*After applying heat at the bottom edge you can put the heating equipment aside.
Step #4. Apply Suction Handle
*Now place the suction handle at the bottom side of the screen.
*Pull it steadily to create a line gap for the opening pick insertion.
Step #5. Insert Opening Pick
*Now we will insert the first opening pick at the bottom of the screen when you see a line gap.
*Cut the bottom edge adhesive between the screen and the frame.
*Move the pick back and forth to cut the adhesive. However, please remember that you can not insert the opening pick more than 3 mm deep into this bottom edge.
*If that’s the case leave this first pick inserted in the bottom edge of the right corner. It will prevent the screen from sticking again to the frame.
Important Information For the Inside of the iPhone 15 Screen
When removing the screen you should know how and where the cable connection is.
*Two thin cables connect the screen to the phone. One cable is just above the mute switch and the other is halfway between the volume down button and the bottom of the phone.
*These cables are delicate and can break easily so handle them carefully.
*Small spring contacts are around the edges of the phone. These are sensitive parts so don’t push your tool in too far or you might bend or damage them.
*Be extra gentle when cutting through the adhesive in these spots to avoid any issues.
Step #6. Apply Heat on All Sides of the iPhone 15
*This one process is done. Now we need to apply heat again to melt the adhesive under all screen edges.
*Pick the same heating equipment you chose (heat gun, hot plate, hair dryer or hair straightener).
*Keep checking the screen’s warmth and applying heat until it gets too hot to touch.
*You can apply heat and change edges side by side.
Step #7. Insert Second Opening Pick
*When you are sure that the screen’s adhesive has melted you will stop heating the screen.
*Now move the opening pick through the right corner and take it to the right edges.
*Keep sliding the pick until you feel a strong stop near the power button. It is a hook that is locking the screen to the frame.
*You will rotate the pick so that the flat side goes in. Twist and turn the pick to release the clip.
*An increased gap will separate the screen from the frame.
*Just write here you will insert the second opening pick right from the first opening pick.
*Now you can take the first opening pick sliding back at the right edges toward the bottom and move the second pick and take it to the top right edges.
*Keep separating the screen from the frame but cutting the adhesive.
*Moving through the bottom edge you will take the pick toward the left corner at the bottom edge.
*Side the pick under the left corner edge and reach the left edge of the iPhone 15.
Step #8. Insertion of the Third Opening Pick and Separating the Screen
*Insert the third opening pick just from the second opening pick inserted at the top right corner.
*Slide the pick from the corner and come to the top edge of the screen
*Be aware that you can insert the pick here. Only 3 mm deep is allowed.
*Move toward the top left corner until you feel the strong stop of the top edge clip.
*To release the clip you need to rotate the pick so that the flat side goes in. Twisting and turning will lift the screen and create a creative gap between the screen and the frame.
*After releasing the clip, move toward the top left corner and cut the adhesive from that corner.
*Be cautious about inserting the pick in the left edge. As you know, there are delicate cables and spring connections. Only 3 mm deep insertion is allowed.
*Keep sliding the opening pick on the left edge of the screen.
*Rotating the pick to the flat side and twisting turning will release the clips securing the screen from the left edges.
*And reach to the left bottom edge. The screen’s adhesive is entirely cut.
Step #9. Prop Open the Screen and Keep It Swing
*Place a box or a stack of books to support the swing-opened screen.
*Please remember to open the screen over the left edge of the screen.
*If you feel the screen is stuck at any spot stop opening it and check where the adhesive is left or where any clip is still locked.
*The screen is attached to the front sensor connector cover and the screen connector cable, so be sure not to strain the cables.
Step #10. Unfasten The Connector Covers, Disconnect the Connectors And Separate The Screen
*First we will cut the front sensor cover screws that are 0.9 mm long.
*You need to pick the tri-point Y000 driver to open the screws.
*Now pick a pointed tip tweezer to remove the cover lifting from the 90-degree angle.
*Unlock the front sensor cover from the logic board and remove it.
*Now the front sensor press connector is visible. You can pry it up using the tip of the opening pick.
*Disconnect the connection of the front sensor from the logic board.
*It is time to uncover the screen connector. The 0.9 mm long screw also secures it.
*A tri-point Y000 driver will work for this screw too. Open it and keep it safely aside.
*With the help of the tweezer, unlatch its hook and remove it to uncover the screen connector.
*Disconnect the screen connect cable with the help of an opening pick.
*At this point the screen of the iPhone 15 is fully separated.
*Keep the screen securely aside. However as you know we may need to replace the screen after replacing the logic board for making the iPhone 15 fully functional. Otherwise you can reuse the screen.
Step #11. The Process To Remove The Back Cover Of The iPhone 15
*After removing the screen you have to place the phone on the soft cloth flipped over the screen side.
*Then apply heat on the rear glass of the iPhone 15 to access the logic board.
*Keep the rear glass with your hand until it gets too hot to touch. Remember excessive heat can damage the battery.
*After heating place a suction handle at the centre of the button edge of the rear glass.
*Pull it steadily and create a line gap for opening pick insertion.
*When you see that enough of a gap is created you can insert an opening pick into the gap.
*Please don’t insert the opening pick more than 5 mm deep into the bottom edge of the rear glass.
*Slide the pick back and forth to cut the adhesive.
Important Information About Inside Of The Rear Glass
*There is a delicate cable near the volume down button that connects the back glass to the phone.
*Be careful not to insert your tool in this area to avoid damaging the cable.
*Around the edge of the phone there are small spring contacts. Make sure not to insert your tool too deeply, as this could bend or damage the contacts.
Step #12. Separate the Rear Glass of the iPhone 15
*Keep sliding the opening pick through the edges of the rear glass.
*Cut the adhesive from the right corner edge and take it to the right side edges.
*Now move it toward the top right edge and feel for the force stop near the down volume button. This is the clip securing the cover to the frame.
*Don’t insert the pick more than 7 mm on the right side.
*Don’t cross the volume buttons to cut the adhesive. As you know there is a delicate cable connection that can get damaged.
*Leave the opening pick inserted near the volume down button. It will keep the rear glass from resticking again.
*You can apply heat again on the back glass. And then insert the second opening pick into the bottom edge again.
Now move the pick toward the left side of the rear glass.
*Keep moving, cutting the adhesive from the bottom left corner.
*Go on and cut the adhesive from the left edges of the phone.
*Here you are allowed to insert an opening 5 mm deep.
*Slide the pick up to the top left corner.
*When you reach the top edge of the phone make sure the opening pick insertion is only 3 mm deep.
*Separate the adhesive from the top edge and keep releasing the hooks that are securing the rear glass to the frame.
*Slide the pick onto the top right corner of the rear cover. And stop sliding the pick when you reach the power button.
*Only a 4 mm deep insertion of the opening pick is allowed in this area.
*Twist and turn the pick to increase the gap between the rear glass and the frame.
*Don’t slide any pick over the power button to the volume down button.
*Keep doing this gentle effort until the rear glass is separated.
Step #13. Swing Open The Back Glass
*Firstly place a box or the stack of books before opening the rear glass.
*Swing open it and rest it with the box.
*If you feel the rear glass is stuck stop opening it. Check if the adhesive is left from cutting or if any hook is still locked with the frame.
Step #14. Open Screws Of The Lower Connector Cover
*During this repair, be sure to keep track of each screw and return it to its original position when reassembling the phone.
*Next you need to use a tri-point Y000 screwdriver to remove the two 1.3 mm screws holding the lower connector cover in place.
*Pick a pointed-tip tweezer to insert it into the cover and push it toward the top of the phone.
*Unlatch the cover from the logic board. And then remove it.
Step #15. Disconnect the Battery
*Removing the lower cover will reveal the battery press connector.
*With one hand hold the back glass upright and carefully rotate it just enough to expose the battery press the connector located under the volume buttons.
*Using the tip of an opening pick gently pry up the battery and press the connector to disconnect it from the logic board.
*You will notice that this connector has a plus and minus sign printed on its head for easy identification.
Step #16. Unfasten the Middle Connector Cover
*This middle connector cover is secured with a 0.9 mm long screw.
*To open this screw you will need the tri-point Y000 driver.
*After unfastening the screw you will pry up the cover with the flat tip of the spudger.
*You can also use your finger to push the cover toward the bottom of the phone.
*Unclip its top edge from the board. And remove the cover.
Step #17. Disconnect the Charging Coil and NFC Connector
*As you remove the middle cover the charging coil and NFC connector will appear.
*Using a spudger you can disconnect the charging coil press connector and NFC connector.
*Now the back glass is fully separated from the frame.
Step #18. Remove the Upper Connector Cover
*It’s time to unfasten the two screws securing the upper connector cover.
*These screws are 1.3 mm long and you will need a tri-point Y000 driver to open them.
*Remove the cover.
*Now you can see the antenna connector, front sensor and the front camera cable connector. (A total of three connectors are there under the upper connector cover).
Step #19. Disconnect The Sensor, Antenna, and Front Camera Cable
*Use an opening pick to pry up the connectors.
*Disconnect the front camera, sensor and antenna press connection cable from the logic board.
*Then remove the front camera and the sensor using a pointed tip tweezer.
*There is an earpiece speaker cable connection near the antenna connector.
*Disconnect the earpiece speaker.
Step #20. Unfasten the Five Screws Securing the Earpiece Speaker
*Use a Phillips #000 screwdriver to remove the five screws holding the earpiece speaker in place.
*Two 1.1 mm screws
*Three 1.6 mm screws
*Once the screws are removed, use tweezers or your fingers to gently lift the earpiece speaker and pull it away from the top of the phone. And freeing the gasket from the frame.
*Carefully remove the earpiece speaker from the iPhone 15.
Step #21. Separate Battery Cable and Disconnect all The Connection from the Logic Board
*Now we need to free the battery cable. It is slightly stuck to the logic board so pick an opening pick to separate the battery cable from the board.
*But you need to be cautious and prevent creasing and bending the cable.
*Now remove all the connections from the logic board.
*With the tip of your opening pick up the volume button press the connector and disconnect it from the logic board.
*Then disconnect the power button connection from the board.
*Disconnector three connectors. Two are rear camera connection press cables and one is for the antenna connection.
*Also, disconnect the Taptic Engine, eSIM and charging port press connector from the logic board. The three connections are in the same place.
Step #22. Unfasten The Five Screws Of The Logic Board And Remove It
*We are using a standoff driver to remove the five standoff screws securing the logic board.
*One 2.9 mm screw
*One 3.9 mm screw
*Three 3.5 mm screws
*A thin flathead screwdriver can be an alternative if you don’t have a standoff driver.
*Just be cautious not to strip the shallow cuts in the screw heads.
*In the next gently grip the top edge of the logic board and carefully pull it out from under the attached cables.
*Once the board feels free remove the logic board from the iPhone 15.
So this was the last step for disassembling the iPhone 15 for removing the logic board to replace it. Now further steps will guide you through the reassembling process from reassembling the logic board to fastening the pentalobe screws and turning the iPhone 15 on.
Step #23. Reassembling the New iPhone 15 Logic Board
*Unpack the new replacement iPhone 15 logic board.
*Take a look at its shape and you will replace it.
*Please make sure all the nine press connectors are on their top when placing and setting the logic board in its slot.
*Press with your fingers to settle it down properly.
*Fasten the logic board’s five screws. The sizes are 2.9 mm, 3.9 mm, and 3.5 mm long screws.
*Make sure every screw goes in the right hole.
Step #24. Connect All The Nine Press Connectors To The Logic Board
*First connect the three connections in one place: the eSIM press connector, the Taptic Engine press connector and the charging port press connector.
*Now connect the rear camera connections and antenna cable. Again these three cables are almost in the same place.
*Connect the power button and volume button press connectors.
*The battery cable is still disconnected. We will connect it in the end.
Step #25. Reassemble the Earpiece Speaker
*Take the earpiece speaker and place it in its slot.
*Press with the finger to adjust it.
*The earpiece speaker was fastened with the 5 screws.
*Use Phillips #000 drivers to tighten the two 1.1 mm long screws and three 1.6 mm long screws.
*After fastening the screws we will connect the press cable of the earpiece speaker.
Step #26. Place the Front Camera and Sensor
*Now it’s time to reassemble the front camera along with the sensor.
*Pick the front camera and sensor with your fingers or use a tweezer to hold it
*Place it on its recess and fix it properly.
*Then connect the press cable to the logic board.
Step #27. Fasten the Upper Connector Cover
*Now place the upper cover on the connections you have made.
*Properly arrange it and fasten its two screws.
*Use your tri-point Y000 driver for the 1.3 mm long screws to secure the upper cover.
Step #28. Reassemble the Rear Glass of the iPhone 15
*For reassembling the back glass you need adhesive replacement for iPhone 15.
*For a new adhesive application you need to clean the old adjective from the rear glass and the phone’s body.
*Check the new adhesive orientation placing it on the frame. Camera cutout and notches will help you understand the adhesive.
*Peel the blue liner from the bottom side of the adhesive sheet and carefully place it on the frame.
*Do remember if the adhesive sticks wrongly anywhere you can not correct and reuse the same adhesive again.
*Gradually peeling the blue liner and placing it on the frame from the bottom to upward.
*Press with your finger to correctly stick the adhesive on the frame. Then remove the pick adhesive liner.
*Now place a box and prop the screen for connecting the charging coil and NFC connector.
*Place the charging coil cover. Hook lock the cover to the logic board. Use tri-point Y000 driver to fasten it screw to secure it with the board
*Connect the battery press connector to the logic board. Hook lock the battery cover and fasten it with two screws for securing it.
*Remove the final adhesive liner and place the rear glass on the frame.
*Press it gently to correctly fix the rear glass and make sure to correctly lock the hooks into the frame.
Step #29. Reassemble the iPhone 15 Screen
*When you reusing the existing screen you will have to use adhesive replacement for the screen.
*Otherwise the new screen comes with pre-installed adhesive.
*Anyhow firstly make sure the existing screen should be clear from the old adhesive. Remove all the residuals from the screen and the frame.
*Orientation of the new adhesive sheet placing it on the frame. See cutouts for ideas.
*Peel the blue liner from the bottom and carefully place the Adhesive on the frame.
*Apply the Adhesive on the bottom and keep aligning it toward the top.
*Use the flat tip spudger or your finger to correctly stick the adhesive on the frame.
*Remove the large blue liner from the adhesive.
*Connect the screen press connector.
*Place the cover on the screen connector and lock its hook to the logic board correctly.
*Secure the screen cover with its 0.9 mm long screws.
*Connect the front sensor press connector.
*Place the front sensor cover in its slot and lock the cover to the logic board. To make it easy insert the cover at a 90-degree angle to re-engage the hook before laying it flat against the press connector.
*Fasten it’s 0.9 mm long screw.
*Fold the screen on the frame. Make sure to place the screen with the right alignment.
*Remove the final adhesive liner.
*Gently press the screen to insert the clip into the frame.
Step #30. Fasten Pentalobe Screws And Turn On the iPhone 15
*Now insert the Pentalobe Screws and fasten them.
*Turn on your iPhone 15 and check everything is working correctly.
Finally
The iPhone 15 logic board replacement is completed successfully. We hope that everything went well at your side too. If anything does not go as planned you can ask us for help. You email us. However please appreciate us if you find this guide helpful. Do comment and keep sharing this guide to help others too. Best of luck!
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