Einleitung

Follow this guide to replace the motherboard (aka main board or logic board) in your Samsung Galaxy S25+ smartphone.

If your Galaxy doesn't power on or randomly shuts down, you may need to replace the motherboard.

Note: You'll need replacement back cover adhesive to complete this repair.

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    • Let your Galaxy's battery drain below 25% before starting this repair—a charged lithium‑ion battery may catch fire if damaged.

    • Unplug all cables from your phone.

    • Completely power off your phone by holding the side key and volume down button and selecting Power off.

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    • Glass shards can complicate disassembly—or worse, cause injury. If your phone's back glass is cracked, follow this step.

    • Apply strips of packing tape to the cracked glass until it's completely covered—this will help keep the glass contained and allow the suction cup to stick.

    • Make sure there's a single strip (not overlapping) of tape across the bottom edge, big enough for a suction cup to fit on.

    • Only cover the glass itself—don't stick any tape to the frame.

    • Consider wearing safety glasses to protect your eyes from any glass shaken free during the repair.

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    • Adhesive secures the back cover to the frame. Heating the cover softens the adhesive, making it easier to separate.

    • Heat an iOpener and lay it on the bottom edge of the back cover for two minutes.

    • Alternatively, you can use a hair dryer or heat gun to heat the cover.

    • Improper use of a heat gun can destroy the display and/or battery—follow the linked instructions carefully.

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    • While the back cover heats, note the following about its adhesive:

    • The cover is secured with adhesive around the perimeter of the frame. Use this picture as a reference while you separate the adhesive.

    • Only insert your tool slightly under the cover near the cameras to avoid damaging them.

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    • Apply a suction handle to the center of the back cover's bottom edge, as close to the edge as possible.

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    • Pull up on the suction handle with strong, steady force until a gap forms between the back cover and frame.

    • Use the fingers of your lifting hand to hold the phone down, or steady the frame with your free hand—be careful, your phone may be hot.

    • Insert the tip of an opening pick into the gap.

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    • If the back cover feels stuck at any point when separating the adhesive, apply heat to the area and try again.

    • Slide the opening pick along the bottom edge to separate the adhesive.

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    • Slide the opening pick around the bottom right corner and up the right edge to separate the adhesive.

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    • In the next two steps, only insert the pick slightly (a few millimeters) near the cameras to avoid damaging them.

    • Slide the opening pick around the top right corner and along the top edge to separate the adhesive.

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    • Slide the opening pick around the top left corner and down the left edge to separate the adhesive.

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    • Use the suction handle to lift and remove the back cover.

    • If the cover still feels stuck, go back around the perimeter with an opening pick and separate any remaining adhesive.

    • 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.

    • Check your rear cameras for any smudges and gently wipe them with a clean, lint–free cloth if necessary.

    • Your replacement back cover adhesive will be applied to either the frame or the back cover. Use cutouts and contours to see where it lines up best. If it matches the back cover, follow this guide. If it matches the frame, use this guide.

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    • Use the point of a spudger to pry up and disconnect the wireless charging coil press connector.

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    • Throughout this repair, keep track of each screw and make sure it goes back exactly where it came from to avoid damaging your phone.

    • Use a Phillips screwdriver to remove the thirteen screws securing the wireless charging and loudspeaker assembly:

    • Six 3.5 mm‑long screws securing the wireless charging coil

    • Seven 3.5 mm‑long screws securing the loudspeaker

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    • Use the point of a spudger to pry up and lift the left side of the loudspeaker until it unclips.

    • During reassembly, press firmly around the perimeter of the loudspeaker to engage its clips.

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    • Use two hands to remove the wireless charging and loudspeaker assembly.

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    • Every press connector has a corresponding gold arrow on the board that shows the proper location to pry—nifty! Prying at the wrong location risks damaging the fragile surface‑mounted components on the board.

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

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    • Use the point of a spudger to pry up and disconnect the earpiece speaker press connector (the uppermost one) from the top right of the motherboard.

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    • Use a Phillips screwdriver to remove the five 3.5 mm‑long screws securing the earpiece speaker.

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    • Use the point of a spudger to lift the earpiece speaker by the center of the bottom edge until it unclips.

    • Remove the speaker.

    • During reassembly, press firmly around the perimeter of the speaker to engage its clips.

    • Be careful not to smudge the cameras or press on surface-mounted components.

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    • Use the point of a spudger to pry up and disconnect the interconnect and screen cable press connectors (three total) from the bottom edge of the motherboard.

    • Optionally, you can disconnect the other ends of the cables from the bottom of the phone and remove them for easier access.

    • During reassembly, remember to reconnect both ends of the cables if you removed them.

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    • Use the point of a spudger to disconnect the selfie camera and mmWave antenna press connectors.

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    • Use a Phillips screwdriver to remove the two 3.5 mm‑long screws securing the rear cameras.

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    • Only grip the motherboard by its edges—not the cameras—or you risk damaging connectors and surface-mounted components.

    • Lift the top edge of the motherboard and remove it, making sure no cables get snagged.

    • During reassembly, you may need to hold cables out of the way or reposition them when sliding the motherboard into place.

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    • Flip the motherboard over and hold it slightly above your work surface while working on the cameras—don't press the board against your work surface, or you may damage fragile components.

    • Be very careful not to scratch or smudge the cameras, as they're exposed on the bottom of the board.

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    • The cameras should be removed from top to bottom because of the way they're slotted into each other.

    • Use the point of a spudger to pry up and disconnect the ultrawide camera (top) press connector.

    • Remove the ultrawide camera.

    • During reassembly, in addition to slotting into the camera below it, the ultrawide camera also has two pegs that go into cutouts on the motherboard.

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    • Use the point of a spudger to pry up and disconnect the wide-angle camera (middle) press connector.

    • Remove the wide-angle camera.

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    • Use the point of a spudger to pry up and disconnect the telephoto camera (bottom) press connector.

    • Remove the telephoto camera.

    • During reassembly, make sure all the cameras properly slot into each other. Use this photo to make sure everything is in the right place—the cameras should be close together with only a slight amount of wiggle room.

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    • You're left with the motherboard for replacement.

Abschluss

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before you install it.

To reassemble your device, follow these instructions in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

Spencer Day

Mitglied seit: 14/09/22

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