Samsung Galaxy S8 - Replacing the fingerprint sensor

The fingerprint sensor no longer recognizes your fingerprint.

  • Galaxy S8
  • 8 Steps
  • Medium
  • 30 min.
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Introduction

This repair guide shows you how to replace the fingerprint sensor of your Galaxy S8. This fix is necessary, if your Galaxy S8 no longer recognizes your fingerprints or doesn't let you register new fingerprints.

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
  • For storing screws

    For storing screws

    We recommend storing your screws so you don’t mix up the various screws and small parts.

    €10.00 at the iDoc store
  • Tweezers

    Tweezers

    We recommend using tweezers to remove screws and various small parts from your device.

    €16.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

    You need a flat plastic prying tool to disconnect the various plugs and connectors.

    €1.00 at the iDoc store
  • Suction cup

    Suction cup

    A suction cup is perfect for lifting smooth surfaces such as displays or rear glass panels.

    €2.00 at the iDoc store
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    €10.00 at the iDoc store

Required replacement part

  • Samsung Galaxy S8 / S8+ Fingerabdrucksensor Midnight Black

    Samsung Galaxy S8 / S8+ Fingerabdrucksensor Midnight Black

    Dieses Ersatzteil brauchst Du, wenn dein Samsung Galaxy S8 oder S8 Plus deinen Fingerabdruck nicht mehr erkennt oder du keine neuen Fingerabdrücke mehr registrieren kannst. Dazu baust du dieses Teil in dein Backcover ein. Auch bekannt als Fingerprint-Sensor und Fingerabdruck-Scanner.

    €23.00 at the iDoc store
Show all replacement parts for the Galaxy S8 

Replacement parts and tools for this repair

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

Samsung Galaxy S8 / S8+ Fingerabdrucksensor Arctic Silver

Dieses Ersatzteil brauchst Du, wenn dein Samsung Galaxy S8 oder S8 Plus deinen Fingerabdruck nicht mehr erkennt oder du keine...

Werkzeugset Samsung

Ganz gleich, welches Problem dein Handy hat - mit unserem Werkzeugset kannst du es bestimmt beheben. Dieses Reparaturset umfasst jeweils einen...

together for €72.00

Samsung Galaxy S8 / S8+ Fingerabdrucksensor Midnight Black

Dieses Ersatzteil brauchst Du, wenn dein Samsung Galaxy S8 oder S8 Plus deinen Fingerabdruck nicht mehr erkennt oder du keine...

Werkzeugset Samsung

Ganz gleich, welches Problem dein Handy hat - mit unserem Werkzeugset kannst du es bestimmt beheben. Dieses Reparaturset umfasst jeweils einen...

together for €72.00

Samsung Galaxy S8 / S8+ Fingerabdrucksensor Orchid Grey

Dieses Ersatzteil brauchst Du, wenn dein Samsung Galaxy S8 oder S8 Plus deinen Fingerabdruck nicht mehr erkennt oder du keine...

Werkzeugset Samsung

Ganz gleich, welches Problem dein Handy hat - mit unserem Werkzeugset kannst du es bestimmt beheben. Dieses Reparaturset umfasst jeweils einen...

together for €72.00

Getting started

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

8 steps
  1. Switching off your device

    Galaxy S8 - Switching off your device 01
    Galaxy S8 - Switching off your device 02
    Galaxy S8 - 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 S8 and wait until the screen goes blank.
  2. Removing the SIM and microSD card tray

    Galaxy S8 - Removing the SIM and microSD card tray 01
    Galaxy S8 - Removing the SIM and microSD card tray 02
    1. Use the SIM tool to eject the SIM card tray from your device and then remove the tray with your fingers.
  3. Removing the back cover

    Galaxy S8 - Removing the back cover 01
    Galaxy S8 - Removing the back cover 02
    Galaxy S8 - Removing the back cover 03
    Galaxy S8 - Removing the back cover 04
    Galaxy S8 - Removing the back cover 05
    Galaxy S8 - Removing the back cover 06

    To loosen the back cover, use a heat gun or an ordinary hair dryer. Warm glue is easier to loosen, allowing you to remove the back cover. 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 suction cup on the bottom of the back cover.
    2. Press a flat tool between the back cover and the frame and pull on the suction cup.

    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.
  4. Disconnecting the fingerprint sensor

    Galaxy S8 - Disconnecting the fingerprint sensor 01
    Galaxy S8 - Disconnecting the fingerprint sensor 02
    Galaxy S8 - 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.
  5. Removing the fingerprint sensor

    Galaxy S8 - Removing the fingerprint sensor 01
    Galaxy S8 - Removing the fingerprint sensor 02
    Galaxy S8 - Removing the fingerprint sensor 03

    Carefully run the steel spatula around the edges of the fingerprint sensor to unglue it.

    Once it is completely unglued, you can take out the sensor easily.

    If the sensor is hard to remove, use a heat gun to soften the glue.

  6. Inserting the new fingerprint sensor

    Galaxy S8 - Inserting the new fingerprint sensor 01
    Galaxy S8 - Inserting the new fingerprint sensor 02
    Galaxy S8 - Inserting the new fingerprint sensor 03
    1. Put fingerprint sensor back into its original position on the back cover.
    2. Slightly press down the sensor so the glue bonds better.
  7. Attaching the back cover

    Galaxy S8 - Attaching the back cover 01
    Galaxy S8 - Attaching the back cover 02
    Galaxy S8 - Attaching the back cover 03
    1. Put the back cover back in its original position.
    2. Connect the fingerprint sensor again.
    3. 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.

  8. Inserting the SIM and microSD card tray

    Galaxy S8 - Inserting the SIM and microSD card tray 01
    1. Insert the SIM card tray back into your device. Make sure the tray is positioned properly.
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