Einleitung
Use this guide to remove or replace the screen on your Xiaomi Redmi Note 9.
If the frame is deformed, it's important to replace it to make sure the new screen will mount correctly and won’t suffer damage from uneven pressure.
Before disassembling your device, discharge the battery below 25%. The battery can catch fire and/or explode if accidentally punctured, but the chances of that happening are much lower if discharged.
If your battery is swollen, take appropriate precautions.
Note: This guide instructs you to replace only the screen while leaving the original frame and motherboard in place. However, some replacement screens for this phone come pre-installed in a new frame (a.k.a. chassis), which requires a very different procedure. Make sure you have the correct part before starting this guide.
Before you begin this procedure, be sure to have a set of replacement adhesives for both the back cover and the screen.
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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 left edge of the phone.
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Press directly into the hole to eject the SIM card tray.
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Remove the SIM card tray.
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Prepare an iOpener and apply it to the back cover for at least two minutes to loosen the adhesive underneath.
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Secure a suction handle to the bottom edge of the screen, as close to the edge as possible.
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Lift the phone assembly with the suction handle to create a small gap between the assembly and the back cover.
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Insert an opening pick in a steep angle into the gap you created. This might require some force.
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Slide the opening pick to the bottom right corner to slice the adhesive and release the plastic clips holding the back cover in place.
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Insert a second opening pick in a steep angle at the bottom edge of your phone.
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Slide the opening pick to the bottom left corner to release the plastic clips and to slice the adhesive.
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Leave the opening picks in place to prevent the adhesive from resealing.
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Insert a third opening pick in a steep angle at the bottom left corner of your phone.
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Slide the opening pick along the left edge of your phone to release the plastic clips and slice the adhesive.
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Leave the opening pick in the top left corner to prevent the adhesive from resealing.
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Insert a fourth opening pick in a steep angle at the bottom right corner of your phone.
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Slide the opening pick along the right edge of your phone to release the plastic clips and slice the adhesive.
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Leave the opening pick in the top right corner to prevent the adhesive from resealing.
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Flip your Redmi Note 9 over.
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Carefully fold the back cover to the right side of the phone assembly like you would open a book from the back.
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Slide the back cover underneath the phone assembly so that the phone assembly overlaps about one third of the back cover and the fingerprint cable is not strained.
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Use a Phillips screwdriver to remove the eleven 3.9 mm-long screws securing the motherboard cover.
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Insert the tip of an opening pick underneath the bottom left edge of the motherboard cover.
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Pry up the motherboard cover.
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Use a spudger to disconnect the fingerprint cable by prying the connector straight up from its socket.
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Separate the phone assembly from the back cover.
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Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.
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Use a spudger to disconnect the display cable by prying the connector straight up from its socket.
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Use a Phillips screwdriver to remove the seven 3.9 mm-long screws securing the loudspeaker assembly.
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Apply a heated iOpener or a heat gun to the screen to loosen the adhesive underneath. Apply the iOpener for at least two minutes.
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Once the screen is warm to touch, apply a suction cup to the bottom edge of the screen.
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Lift the screen with the suction handle to create a small gap between the screen and the frame.
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Insert an iFlex in the gap between the midframe and the screen.
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Insert an opening pick above the iFlex.
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Slide the opening pick to the bottom left corner of the screen to slice its adhesive. Leave the opening pick in place to prevent the adhesive from resealing.
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Remove the iFlex.
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Insert a second opening pick and slide it to the bottom right corner of the screen to cut the adhesive.
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Leave the opening pick in place to prevent the adhesive from resealing.
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Insert a third opening pick underneath the bottom left corner of the screen.
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Slide the opening pick along the left edge of the screen to slice the adhesive. Leave it in the top left corner to prevent the adhesive from resealing.
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Insert a fourth opening pick at the top left corner of the screen.
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Slide the opening pick along the top edge of the phone to slice the adhesive.
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Leave the opening pick in the top right corner of the screen to prevent the adhesive from resealing.
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Insert a fifth opening pick and slide it along the right edge of the phone to slice the remaining adhesive.
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If possible, turn on your device and test your repair before installing new adhesive and resealing.
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 installing.
To reassemble your device, follow the above steps in reverse order.
The best way to secure the new screen is to apply a sheet of custom-cut double-sided tape to the back of the screen.
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.
