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Introduction

The motherboard is the brain of your phone. You may need to replace the motherboard if your phone is having major issues. Before you start, it may be beneficial to check out this troubleshooting page to diagnose your problems.

Be forewarned- if you replace your motherboard, your device will lose its waterproof capabilities. You will need to replace the waterproof seal if you see your device getting wet in the near future.

  1. Before you begin, switch off your phone.
    • Before you begin, switch off your phone.

    • Apply a heated iOpener to a long edge of the phone to loosen the adhesive beneath the rear glass. Apply the iOpener for at least two minutes.

    • You might need to reheat and reapply the iOpener several times during the removal procedure to get the adhesive warm enough to cut. Follow the iOpener instructions to avoid overheating.

    • The adhesive of the Samsung Galaxy S9 is very strong. A hair dryer, heat gun, or hot plate may also be used if you aren't able to open the device with the iOpener. Be careful not to overheat the phone—the AMOLED display and internal battery are both susceptible to heat damage.

    Nightmare. Impossible to get the back off so far. Being trying using the iOpener with hair dryer for last 1hr. No chance.

    Chris Bunney - Reply

    You’re right Chris. I’ve tried on 3 separate occasions now and haven’t been able to budge that back. All that has happened is the pick has taken a piece out of the glass back leaving a rough edge now.

    grahamcatto - Reply

    it was not easy but doable.

    Clinton Stark - Reply

    It’s difficult, but the trick I did to get it was to wrap the hot iOpener around a bottom corner, apply the suction cup, then I covered the opener and phone with a paper plate, better insulating the area. Then I set my blow dryer to high heat and low velocity and heated the area under the plate for about a minute. Right after turning off the blower, I took off the plate and pulled the suction cup with a cutter at hand. You’ll hear a bit of a cracking/popping noise when the adhesive is starting to give, just apply a little more force and push the cutter at the seam. This method worked great for me, so good luck and just keep at it — you’ve got this!

    Nicholas Weger - Reply

    I used nearly boiling water in a storage zip bag on the phone for 10 minutes. I can’t really recommend this method, but thankfully the bag did not leak - an iOpener is probably a much better way to go. Regardless, the bag covered the entire back of the phone, and the phone was too hot to hold, but I still could not get the glass to budge with the suction cup after struggling with it for about an hour and multiple reheats. I ended up epoxying a 2”x2” square of PVC board to the bottom of the cover and built a relatively complex fixture that pulled on the PVC with the turn of a screw while it held down the frame by the edges. After heating the edges up again It did lift the glass enough to get a pick underneath it, but it cracked the glass and it was a pain to slide a pick around the edge while the glass was cracking all the way around. Once I finally got all the glass off, I spent the next 30 minutes (which is what this entire process is supposed to take… what a joke!) cleaning the adhesive off the phone.

    drbenton815 - Reply

    Heavy Duty Heat Gun from popular discount tool store for the win!

    Jesse Meyer - Reply

    Well, it is not obvious how to do this. I have no iOpener, but a heat cushion for remedy hurting muscles and sometimes a backpain. It is filled with grain of some kind and it is to be heated in a microwave oven for about 3 minutes. After that I enveloped this cushion round the phone and brewed myself a cup of tea. After ten miutes the phone was warm (almost hot) and I was able to press the tip of a small (very small) knife above the charging port into the connection between the phone body and the backplate. A very small opening emerged slowly (this is the critical point in this process) and I was able to start using the iFixit opening picks. It became obvious to me that the opening picks are too blunt to achive this with them. But after starting carefully with the (very small and very sharp) knife, everything went straight forward. Thou I had to give the phone a second heatpush with my heat cushion before the backplate came loose.

    borutberg - Reply

  2. In the following steps, you'll be cutting through the adhesive securing the back cover.
    • In the following steps, you'll be cutting through the adhesive securing the back cover.

    • The adhesive in the inside of the back cover is laid out as seen in the image.

    • You'll be slicing through the adhesive in the areas shown:

    • Thick portions of adhesive

    • Thin areas of adhesive

    • Avoid prying or slicing in this area, to protect the fingerprint sensor flex cable.

  3. If the phone's rear glass is cracked, the suction cup may not stick. Try lifting it with strong tape, or superglue the suction cup in place and allow it to cure so you can proceed. Press a suction cup onto the back cover. Lift the back cover's bottom edge with your suction cup, opening a slight gap between the back cover and the frame.
    • If the phone's rear glass is cracked, the suction cup may not stick. Try lifting it with strong tape, or superglue the suction cup in place and allow it to cure so you can proceed.

    • Press a suction cup onto the back cover.

    • Lift the back cover's bottom edge with your suction cup, opening a slight gap between the back cover and the frame.

    • This may require a significant amount of force, but you only need to open a very slight gap with the suction cup to insert your tool. If you have trouble, apply more heat to further soften the adhesive, and try again. The adhesive cools very fast, so you may need to heat it repeatedly.

    • Insert an opening pick in the gap you created and slide it to the bottom right corner.

    • Insert a second opening pick and slide it to the bottom left corner.

    • Insert a third opening pick to prevent the adhesive from resealing during the rest of the removal procedure.

  4. While inserting only the tip of the opening pick, slide it from the bottom left corner along the side to the top. Slide the pick around the top corner and leave it there to prevent the adhesive from resealing.
    • While inserting only the tip of the opening pick, slide it from the bottom left corner along the side to the top.

    • Slide the pick around the top corner and leave it there to prevent the adhesive from resealing.

  5. Slide the opening pick from the bottom right corner along the side to the top. Apply more heat if the adhesive becomes hard to cut. During the removal process, the back cover is under tension all the time and is likely to break if the adhesive isn't softened enough. Slide the opening pick around the corner and cut the remaining adhesive at the top of the phone.
    • Slide the opening pick from the bottom right corner along the side to the top.

    • Apply more heat if the adhesive becomes hard to cut. During the removal process, the back cover is under tension all the time and is likely to break if the adhesive isn't softened enough.

    • Slide the opening pick around the corner and cut the remaining adhesive at the top of the phone.

    • Don't open the phone all the way yet. The fragile fingerprint sensor cable still connects the back cover to the motherboard.

  6. Carefully lift the side of the rear glass where the volume button is located. Use the edge of a spudger to pry up and disconnect the fingerprint sensor flex cable.
    • Carefully lift the side of the rear glass where the volume button is located.

    • Use the edge of a spudger to pry up and disconnect the fingerprint sensor flex cable.

  7. Remove the rear glass.
    • Remove the rear glass.

    • When reassembling follow this guide to replace the adhesive and reinstall the rear glass.

    • In case you want to replace your rear glass follow this guide to transfer the rear camera bezel including the fingerprint.

  8. Remove fifteen 4mm screws with a #000 Phillips screwdriver.
    • Remove fifteen 4mm screws with a #000 Phillips screwdriver.

  9. Remove the NFC coil assembly.
    • Remove the NFC coil assembly.

    This is not quite as easy as the simple statement “Remove the NFC coil assembly” would lead you to believe. The top and left side of the plastic bracket attached to the coil have tabs inserted into the frame of the phone and you can’t just pick the coil assembly up. It takes a bit of force, and I used a spudger to gently pry along the top from right to left to pop the tabs free, and then the tabs on the left came out more easily. Do not just pull on the coil and bend it up.

    drbenton815 - Reply

  10. Remove the motherboard bracket.
    • Remove the motherboard bracket.

    My phone did not have a separate bracket covering the motherboard.

    jason boesiger - Reply

    The NFC/wireless charging coil is adhered to the motherboard bracket, and in my case they both came off together.

    drbenton815 - Reply

    Also, for safety, the battery connecter should be disconnected in this step rather than waiting until after removing the speaker cover/antenna assembly.

    drbenton815 - Reply

  11. Remove the speaker cover/antenna assembly.
    • Remove the speaker cover/antenna assembly.

    Forgot step to disconnect battery.

    Kara Monster - Reply

    Hi Kara! If I remember correctly, we didn’t need to remove the battery. However, it’s been over a year, so I could definitely be wrong.

    Ani Svadjian - Reply

  12. Disconnect the battery by using a spudger to pry open the connection.
    • Disconnect the battery by using a spudger to pry open the connection.

  13. Remove one 3mm screw with a #000 Phillips screwdriver.
    • Remove one 3mm screw with a #000 Phillips screwdriver.

  14. Disconnect 6 cables by prying apart the connections with a spudger.
    • Disconnect 6 cables by prying apart the connections with a spudger.

  15. Take out the SIM card by using a SIM card remover or unbent paper clip to depress the release lever. Take out the SIM card by using a SIM card remover or unbent paper clip to depress the release lever.
    • Take out the SIM card by using a SIM card remover or unbent paper clip to depress the release lever.

    this is one more screw on the motherboard that you must remove before prying it out! it hold the board to the midframe. it is located just near the curve of the battery ribbon cable.

    Andrea McFerran - Reply

  16. Remove the motherboard by prying it out with the spudger. Remove the motherboard by prying it out with the spudger. Remove the motherboard by prying it out with the spudger.
    • Remove the motherboard by prying it out with the spudger.

    There is another connector on the back side of the motherboard at the very bottom left that you must pry apart with a spudger before removing the mother board.

    drbenton815 - Reply

Conclusion

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

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Ani Svadjian

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2 Comments

Extremely helpful and good details. Galaxy S9 screen with frame chassis swap out from a dead screen.0

Jo C. - Reply

Are there any issues with replacing the motherboard in phone sold for one region, such as the SM-G960U, with the motherboard for a different region, such as the SM-G960F?

John Smith - Reply

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