Samsung Galaxy S21 Plus Logic Board Repair

A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

Secure a suction handle to the bottom edge of the back cover, as close to the edge as possible.

If the back cover is cracked, the suction handle may not stick. Try [https://d3nevzfk7ii3be.cloudfront.net/igi/4MmKE22Cy2MavVZU|lifting it with strong tape|new_window=true], or superglue the suction handle in place and allow it to cure so you can proceed.

Lift the back cover with the suction handle to create a small gap between the back cover and the frame.

If you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the [https://www.ifixit.com/Guide/iOpener+Heating/25705|iOpener|new_window=true] instructions to avoid overheating.

Insert an opening pick into the gap you created.

Slide the opening pick to the bottom left corner to slice the adhesive.

Leave the opening pick in place to prevent the adhesive from resealing.

Insert a second opening pick at the bottom edge of your phone.

Slide the opening pick to the bottom right corner to slice the adhesive.

Leave the opening picks in place to prevent the adhesive from resealing.

If the adhesive becomes hard to cut, it has most likely cooled down. [https://www.ifixit.com/Guide/iOpener+Heating/25705|new_window=true|Use your iOpener] for two to three minutes to reheat it.

Insert a third opening pick at the bottom right corner of your phone.

Slide the opening pick along the right edge of your phone to slice the adhesive.

Leave the opening pick in the top right corner to prevent the adhesive from resealing.

When you slice near the camera assembly, insert only the tip of the opening pick (~4-5 mm) to avoid damaging or smearing the camera.

Insert a fourth opening pick underneath the top right corner of your phone.

Slide the opening pick along the top edge to slice the adhesive.

Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Insert a fifth opening pick underneath the bottom left corner.

Slide the opening pick along the left edge of the back cover to slice the remaining adhesive.

When you slice near the power button, insert only the tip of the opening pick (~3-4 mm) to avoid damaging the power and volume button flex cable.

Remove the back cover.

During reassembly:

This is a good point to power on your phone and test all functions before sealing it up. Be sure to power your phone back down completely before you continue working.

Remove any adhesive chunks with a pair of [product|IF145-020|tweezers] or your fingers. Use some high concentration (over 90%) isopropyl alcohol to wipe away any adhesive residue.

If you're using Samsung custom-cut adhesives, [guide|124003|follow this guide|new_window=true].

If you're using double-sided tape, [guide|113604|follow this guide.|new_window=true]

Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a thermal event.

Be careful of the cable that runs beneath the charging coil. Work slowly and stop sliding the pick if it catches on the cable.

Insert an opening pick underneath the left bottom end of the NFC antenna and charging coil assembly.

Carefully slide the opening pick along the bottom left edge of the assembly to separate it from the battery.

Insert an opening pick underneath the bottom end of the NFC antenna and charging coil assembly.

Carefully slide the opening pick along the bottom of the assembly to separate it from the loudspeaker.

Use a spudger to disconnect the charging coil by prying the connector straight up from its socket.

Use a spudger to disconnect the NFC antenna by prying the connector straight up from its socket.

Use a Phillips screwdriver to remove the five 3.9 mm-long screws securing the NFC antenna and charging coil assembly.

Use a pair of [product|IF145-020|tweezers] or your fingers to carefully remove the NFC antenna and charging coil assembly.

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

Use a Phillips screwdriver to remove the six 3.9 mm-long screws securing the loudspeaker assembly.

Insert an opening pick into the gap between the top edge of the loudspeaker assembly and the midframe.

Use your opening pick to pry up the loudspeaker assembly by tilting it downwards.

Remove the loudspeaker assembly.

During reassembly apply new adhesive where it's necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

Use a spudger to disconnect the main and interconnect flex cables from the motherboard by prying their upper connectors straight up from their sockets.

Use a spudger to disconnect the main flex cable from the daughterboard by prying its bottom connector straight up from its socket.

Use your fingers or a pair of [product|IF145-020|tweezers] to carefully remove the main flex cable.

Use a spudger to disconnect the interconnect flex cable from the daughterboard by prying its bottom connector straight up from its socket.

Use your fingers or a pair of tweezers to carefully remove the interconnect flex cable.

Insert a SIM card eject tool, a SIM eject bit, or a straightened paper clip into the hole on the SIM tray located at the bottom edge of the phone.

Press directly into the hole to eject the SIM card tray.

Remove the SIM card tray.

Use a Phillips screwdriver to remove the three 3.4 mm-long screws securing the charging board.

Insert the pointed end of a spudger underneath the left edge of the charging board next to the main flex cable connector.

Use your spudger to pry up the charging board.

Use a pair of [product|IF145-020-4|blunt tweezers] or your fingers to remove the charging board. Start by lifting its top edge up and then carefully slide the USB-C connector out of its recess.

During reassembly apply new adhesive where it's necessary after cleaning the relevant areas with isopropyl alcohol (>90%).