Galaxy Note 9 fingerprint sensor replacement guide

The fingerprint sensor no longer recognizes a finger

  • Galaxy Note 9
  • 7 Steps
  • Medium
  • 30 min.
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Introduction

With this detailed step-by-step guide, you can easily replace the fingerprint sensor of your Galaxy Note 9 at home.

Removing the back cover is a somewhat more diffucult procedure, so plan enough time for it.

Do a backup before the repair, use a clean work surface and reserve enough time. If you are stuck at any point, just contact our live chat or write a comment on the corresponding step.

Required tools

  • Flache Plektren

    Flache Plektren

    You need a very flat tool such as a flat pick to pry out parts that are glued in place.

    €1.00 at the iDoc store
  • Heat gun

    Heat gun

    You can use a heat gun to heat parts that are glued on so they’re easier to remove. In most cases, you can also use a hairdryer.

    from €14.99 on Amazon
  • iFlex opening tool

    iFlex opening tool

    Die kleinen Teile in deinem Smartphone auseinanderzukriegen kann eine sehr große Arbeit bedeuten. Die Klinge des kompakten aber stabilen iFlex hat eine Dicke von nur 0,15 mm, sodass es auch in den kleinsten Spalten reinpasst, beispielsweise zwischen dem Display und dem Rahmen oder unter dem Logicboard. Das praktische iFlex ist aus hochwertigem rostfreiem Stahl und liegt gut in der Hand. Damit ist es der perfekte Helfer bei jeder Smartphone-Reparatur.

    €9.00 at the iDoc store
  • iPlastix

    iPlastix

    Dein Smartphone zu öffnen kann eine sehr empfindliche Angelegenheit sein. Die Klinge des biegsamen aber stabilen iPlastix hat eine Dicke von nur 0,15 mm, sodass es auch in den kleinsten Spalten reinpasst, beispielsweise zwischen dem Display und dem Rahmen oder unter dem Logicboard. Das praktische iPlastix ist aus biegsamem Kunststoff und liegt gut in der Hand. Damit ist es der perfekte Helfer bei jeder Smartphone-Reparatur.

    €9.00 at the iDoc store
  • Steel Laboratory Spatula

    Steel Laboratory Spatula

    You need a flat and sturdy prying tool to disconnect glued parts.

    €9.00 at the iDoc store
Show all replacement parts for the Galaxy Note 9 

Replacement parts and tools for this repair

Our tools plus the right spare part help you fix your device easily.

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Getting started

If you get stuck or have questions, you can post a comment for each step. We’d be happy to help.

7 steps
  1. Switching off your device

    Galaxy Note 9 - Switching off your device 01
    Galaxy Note 9 - Switching off your device 02
    Galaxy Note 9 - Switching off your device 03
    1. Turn off your device by holding down the power button until the “Power off” option appears.
    2. Use your finger to confirm that you want to shut down your Galaxy Note 9 and wait until the screen goes blank.
  2. Removing the back cover

    Galaxy Note 9 - Removing the back cover 01
    Galaxy Note 9 - Removing the back cover 02
    Galaxy Note 9 - Removing the back cover 03
    Galaxy Note 9 - Removing the back cover 04
    Galaxy Note 9 - Removing the back cover 05
    Galaxy Note 9 - Removing the back cover 06
    1. The back cover’s really glued to the chassis. Heat the device evenly with hot air to soften the glue. A temperature of 60 - 80°C should be sufficient. As a rule of thumb, you should still be able to touch your device without it being uncomfortably hot.
    2. The easiest way to loosen the back cover is to use a flat and flexible tool such as the iPlastix or iFlex. You will also need several picks to unstick the back cover all around.
    1. Heat the spot where you start and place a flat tool between the back cover and the frame.

    The iPlastix is made of plastic, so it won't scratch the device. On the other hand, it's very soft and tricky to insert.

    Be extra careful, the back cover can break very easily. If necessary, apply the heat several times and try again. Removing the back cover might take half an hour. Take a little more time and work carefully to make sure you don't break anything.

    1. Once the tool is inserted, stick a pick into the gap to keep it open. Then run the tool around the entire edge to gradually loosen the glue.
    2. Then heat the next part and insert the picks one by one.

    The back cover glue is extra strong on the lower edge.

    1. Once the back cover is loosened, lift it very slightly. The fingerprint sensor underneath the camera is still connected with a cable.

    Use a suction cup to lift the glass if you can’t find anywhere to insert the tool

  3. Disconnecting the fingerprint sensor

    Galaxy Note 9 - Disconnecting the fingerprint sensor 01
    Galaxy Note 9 - Disconnecting the fingerprint sensor 02
    Galaxy Note 9 - Disconnecting the fingerprint sensor 03
    1. After detaching the back cover, carefully lift it and disconnect the fingerprint sensor using the spudger.
    2. Then you can completely remove the back cover and set it aside.
  4. Removing the fingerprint sensor

    Galaxy Note 9 - Removing the fingerprint sensor 01
    Galaxy Note 9 - Removing the fingerprint sensor 02
    Galaxy Note 9 - Removing the fingerprint sensor 03
    1. Carefully slide in a steel spatula where the wireless charging coil is glued to the NFC antenna and pry off the contact.
    2. Now slowly remove the entire flex cable from the cover.

    If the cable is hard to remove, you can use a heat gun to soften the glue

  5. Inserting the fingerprint sensor

    Galaxy Note 9 - Inserting the fingerprint sensor 01
    Galaxy Note 9 - Inserting the fingerprint sensor 02
    Galaxy Note 9 - Inserting the fingerprint sensor 03
    1. Remove the old glue from the fingerprint sensor.
    2. Insert the fingerprint sensor into its intended position in the back cover.
    3. Slightly press down the sensor to make it stick.

    If you are installing a new fingerprint sensor, first remove the protective film from the adhesive surface. This of course means there is no need to remove the old adhesive residues.

  6. Connect fingerprint sensor

    Galaxy Note 9 - Connect fingerprint sensor 01
    Galaxy Note 9 - Connect fingerprint sensor 02
    Galaxy Note 9 - Connect fingerprint sensor 03
    Galaxy Note 9 - Connect fingerprint sensor 04
    • Fingerprint connector
    1. Before attaching the back cover, plug in the fingerprint sensor connector.
    2. Use a plastic tool to reach the connector.
  7. Attaching the back cover

    Galaxy Note 9 - Attaching the back cover 01
    Galaxy Note 9 - Attaching the back cover 02
    1. Put the back cover back in its original position.
    2. Press the back cover on all over so the glue will stick.

    You can also heat your device with hot air and then clamp it or weight it down with a couple books so the glue will stick better.

    If you install a new backcover, now remove the last protective films from the adhesive surfaces.

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