Phone · Apple · iPhone 12 Pro Max
Apple iPhone 12 Pro Max Logic Board Repair
Logic Board Repair guide for the Apple iPhone 12 Pro Max
Before you begin
Tools
- P2 Pentalobe screwdriver
- Tri-point Y000 screwdriver
- Phillips #000 screwdriver
- Standoff screwdriver for iPhone
- Plastic spudger
- Suction cup tool
- Heat gun or hair dryer
- Tweezers
- SIM eject tool
Parts / materials
- Replacement display adhesive strip
- Isopropyl alcohol (99%)
- Microfiber cloth
Safety
- Wear an anti-static wrist strap to prevent ESD damage to sensitive logic board ICs.
- Disconnect the battery press connector before removing any other board cables to prevent electrical shorting.
- Use caution when heating the phone to avoid thermal damage to the OLED panel.
Overview
Step-by-step
- 1
Remove Bottom Pentalobe Screws
2 minPower off your iPhone completely. Use a P2 pentalobe screwdriver to remove the two 6.7 mm screws on either side of the Lightning port.
- 2
Heat Lower Display Edge
2 minApply a heated iOpener or heat gun set to low temperature to the bottom edge of the phone for two minutes to soften the adhesive.
- 3
Attach Suction Cup
1 minPlace a suction cup on the lower portion of the display glass, just above the home indicator area.
- 4
Slice Display Perimeter Adhesive
4 minPull up gently on the suction cup to create a small gap, then insert an opening pick and slide it around the bottom and sides to cut the screen adhesive.
- 5
Open Display to Right
2 minSwing the display open from the left side like a book cover, leaning it against a stable object so it does not pull on the flex cables.
- 6
Unscrew Battery Shield
3 minUse a Tri-point Y000 screwdriver to remove the four screws securing the lower connector metal shield.
- 7
Disconnect Battery Flex Cable
2 minUse the flat edge of a spudger to gently pry the battery connector straight up from its logic board socket.
- 8
Disconnect Display Cables
3 minPry the display assembly cable and digitizer cable straight up off their board sockets with a plastic spudger.
- 9
Remove Upper Sensor Shield
3 minUnscrew the three Y000 screws holding the upper sensor assembly shield in place, then remove the metal bracket with tweezers.
- 10
Disconnect Upper Sensor Assembly
2 minPry the upper earpiece speaker and front sensor assembly cable off the board and lift the display free.
- 11
Eject SIM Tray
1 minInsert a SIM eject tool into the SIM tray hole on the side of the housing and press firmly to eject the tray.
- 12
Unscrew Camera Bracket
2 minRemove the two Y000 screws securing the rear camera metal cover and remove the cover with tweezers.
- 13
Disconnect Rear Camera Connectors
3 minPry up the three rear camera press connectors using a plastic spudger and lift the camera module out of the chassis.
- 14
Disconnect Upper Antenna Connectors
3 minDisconnect the Wi-Fi/Bluetooth antenna flex cables near the top left corner using the tip of your spudger.
- 15
Disconnect Lower Flex Cables
4 minDisconnect the Lightning port connector, wireless charging coil, and power/volume button flex cables from the logic board.
- 16
Remove Logic Board Standoff Screws
4 minUse a dedicated standoff screwdriver to remove the standoff screws holding the logic board to the rear enclosure.
- 17
Lift Logic Board Out
3 minGently pry up the bottom edge of the logic board with a spudger and remove it carefully from the phone casing.
After your Apple iPhone 12 Pro Max logic board repair
Power the iPhone 12 Pro Max 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 Max 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 Max repair context in the encyclopedia, or open related DIY guides.
