Xiaomi Redmi Note 8 Fingerprint Reader Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          15 - 25 minutes

Sections

Xiaomi Redmi Note 8 Opening Procedure
8 steps
Fingerprint Reader
3 steps

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Introduction

Before you begin this procedure, be sure to have a set of replacement adhesives for both the rear glass and the fingerprint reader.

What you need

Step 1

              Heat the rear glass

Prepare an iOpener and apply it to the rear glass for at least two minutes to loosen the adhesive underneath.
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.

Prepare an iOpener and apply it to the rear glass for at least two minutes to loosen the adhesive underneath.

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.

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Step 2

              Insert an opening pick

Secure a suction handle to the bottom edge of the rear glass, as close to the edge as possible.
If the rear glass is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.
Lift the rear glass with the suction handle to create a small gap between the back cover and the frame.
In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.
Insert an opening pick into the gap you created.
Slide the opening pick to the bottom right corner to slice the adhesive.
Leave the opening pick in place to prevent the adhesive from resealing.

Secure a suction handle to the bottom edge of the rear glass, as close to the edge as possible.

If the rear glass is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.

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

In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.

Insert an opening pick into the gap you created.

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

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

Step 3

              Slice the adhesive

Insert a second opening pick at the bottom edge of your phone.
Slide the opening pick to the bottom left corner to slice the adhesive.
Leave the opening picks 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 left corner to slice the adhesive.

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

Step 4

              Slice the adhesive

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for one to two minutes to reheat it.
Insert a third opening pick at the bottom left corner of your phone.
Slide the opening pick along the left edge of your phone to slice the adhesive.
Leave the opening pick in the top left corner to prevent the adhesive from resealing.

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for one to two minutes to reheat it.

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

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

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

Step 5

Insert a fourth opening pick underneath the top left corner of your phone.
Slide the opening pick along the top edge to slice the adhesive.
Leave the opening pick in the top right corner to prevent the adhesive from resealing.

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

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

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

Step 6

Insert a fifth opening pick underneath the top right corner.
Slide the opening pick along the right edge of the rear glass to slice the remaining adhesive.
Don’t try to remove the rear glass all the way yet. The camera cover and fingerprint assembly is still adhered to its back.

Insert a fifth opening pick underneath the top right corner.

Slide the opening pick along the right edge of the rear glass to slice the remaining adhesive.

Don’t try to remove the rear glass all the way yet. The camera cover and fingerprint assembly is still adhered to its back.

Step 7

              Open your phone

Carefully fold the rear glass to the right side of the phone assembly like you’d open the back cover of a book.
Avoid straining the finger print cable during this procedure.

Carefully fold the rear glass to the right side of the phone assembly like you’d open the back cover of a book.

Avoid straining the finger print cable during this procedure.

Step 8

              Disconnect the fingerprint reader

Use a spudger to disconnect the fingerprint reader by prying the connector straight up from its socket.
Remove the rear glass assembly.

Use a spudger to disconnect the fingerprint reader by prying the connector straight up from its socket.

Remove the rear glass assembly.

Step 9

              Heat the fingerprint reader adhesive

Prepare an iOpener and apply it to the fingerprint reader on the rear glass assembly for at least one minute to loosen the adhesive underneath.

Prepare an iOpener and apply it to the fingerprint reader on the rear glass assembly for at least one minute to loosen the adhesive underneath.

Step 10

Slide an opening pick underneath the fingerprint reader.
Use the opening pick to slice the adhesive of the fingerprint reader and pry it up.
The fingerprint reader cable is held in place by mild adhesive.
Use the opening pick to carefully loosen the fingerprint reader cable adhesive.

Slide an opening pick underneath the fingerprint reader.

Use the opening pick to slice the adhesive of the fingerprint reader and pry it up.

The fingerprint reader cable is held in place by mild adhesive.

Use the opening pick to carefully loosen the fingerprint reader cable adhesive.

Step 11

              Remove the fingerprint reader

Remove the fingerprint reader.
Apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).
Secure a new rear glass with pre-cut adhesive or double-sided adhesive tape. After installing the rear glass, apply strong, steady pressure to your phone for several minutes to help the adhesive form a good bond—a stack of heavy books works well.

Remove the fingerprint reader.

Apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

Secure a new rear glass with pre-cut adhesive or double-sided adhesive tape. After installing the rear glass, apply strong, steady pressure to your phone for several minutes to help the adhesive form a good bond—a stack of heavy books works well.

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.

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Author

                    Dominik Schnabelrauch

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Introduction#

What you need#

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Introduction

What you need

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