Your display doesn’t adjust to the lighting conditions.

In this guide, we show you how to replace your Galaxy S4 Active’s defective brightness sensor on your own. You need this repair if the display doesn’t respond to ambient light and stays too bright or too dark.

Required tools

  • For storing screws

    For storing screws

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

    from €10.99 on Amazon
  • Menda ESD Spudger

    Menda ESD Spudger

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

    from €26.38 on Amazon
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    from €10.84 on Amazon
Show all replacement parts for the Galaxy S4 Active 
Replacing the brightness sensor
Steps

Steps

18 Steps

Removing the back cover

Removing the back cover

Step 1
Removing the battery

Removing the battery

Step 2
Removing the SIM and microSD cards

Removing the SIM and microSD cards

Step 3
Removing the four metal shields

Removing the four metal shields

Step 4
Removing the chassis screws

Removing the chassis screws

Step 5
Removing the chassis

Removing the chassis

Step 6
Disconnecting the connectors

Disconnecting the connectors

Step 7
Removing the logic board

Removing the logic board

Step 8
Removing the brightness sensor

Removing the brightness sensor

Step 9
Installing the brightness sensor

Installing the brightness sensor

Step 10
Installing the logic board

Installing the logic board

Step 11
Connecting the connectors

Connecting the connectors

Step 12
Installing the chassis

Installing the chassis

Step 13
Fastening the chassis screws

Fastening the chassis screws

Step 14
Installing the four metal shields

Installing the four metal shields

Step 15
Inserting the SIM and microSD cards

Inserting the SIM and microSD cards

Step 16
Installing the battery

Installing the battery

Step 17
Attaching the back cover

Attaching the back cover

Step 18

Getting started with the repair of your Galaxy S4 Active

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

18 steps

  1. Removing the back cover

    Galaxy S4 Active - Removing the back cover 01
    Galaxy S4 Active - Removing the back cover 02
    Galaxy S4 Active - Removing the back cover 03
    Galaxy S4 Active - Removing the back cover 04
    1. There are little clips attaching the back cover to the chassis. The back cover has a little recess right over the power button. Using your fingernail or the spudger, you can lift the cover here.
    2. Carefully disconnect the back cover from the chassis.
    3. Remove the back cover.

  2. Removing the battery

    Galaxy S4 Active - Removing the battery 01
    Galaxy S4 Active - Removing the battery 02
    Galaxy S4 Active - Removing the battery 03
    1. Remove the battery with your fingers. There’s a little hollow in the chassis for lifting out the battery.
    2. Remove the battery.

  3. Removing the SIM and microSD cards

    Galaxy S4 Active - Removing the SIM and microSD cards 01
    1. Remove the SIM card and the microSD card.

  4. Removing the four metal shields

    Galaxy S4 Active - Removing the four metal shields 01
    Galaxy S4 Active - Removing the four metal shields 02
    Galaxy S4 Active - Removing the four metal shields 03
    Galaxy S4 Active - Removing the four metal shields 04
    1. Use the steel laboratory spatula to remove the four metal shields. Use the spatula to pry the covers out of the hollows in the chassis. You can get the tip of the spatula under the covers.

  5. Removing the chassis screws

    Galaxy S4 Active - Removing the chassis screws 01
    1. Remove the twelve Phillips screws that attach the chassis to the display. Put the screws in a container.
      12 x 3.9 mm Phillips screws

  6. Removing the chassis

    Galaxy S4 Active - Removing the chassis 01
    Galaxy S4 Active - Removing the chassis 02
    Galaxy S4 Active - Removing the chassis 03
    Galaxy S4 Active - Removing the chassis 04
    Galaxy S4 Active - Removing the chassis 05
    Galaxy S4 Active - Removing the chassis 06
    Galaxy S4 Active - Removing the chassis 07
    1. The chassis isn’t just screwed onto the display. There are also little hooks keeping it in the display. Use the steel spatula to detach the chassis.
    2. Insert the spatula between the display and the chassis. It’s very easy to start at the power button.
    3. Move the spatula all the way around the device.
    4. Once the chassis is detached, remove it from the display.

  7. Disconnecting the connectors

    Galaxy S4 Active - Disconnecting the connectors 01
    Galaxy S4 Active - Disconnecting the connectors 02
    Galaxy S4 Active - Disconnecting the connectors 03
    Galaxy S4 Active - Disconnecting the connectors 04
    Galaxy S4 Active - Disconnecting the connectors 05
    Galaxy S4 Active - Disconnecting the connectors 06
    1. Disconnect the sub-board’s plug contact.
    2. Disconnect the antenna cable.
    3. Disconnect the connection for the display.
    4. Disconnect the brightness sensor.
    5. Disconnect the proximity sensor.
    6. Disconnect the connection for the front camera.

  8. Removing the logic board

    Galaxy S4 Active - Removing the logic board 01
    Galaxy S4 Active - Removing the logic board 02
    Galaxy S4 Active - Removing the logic board 03
    1. The logic board is hooked onto the attachments for the rear camera and the vibration motor. Carefully push the logic board toward the USB port to detach it.
    2. Carefully lift the logic board.
    3. Remove the logic board from the enclosure.

  9. Removing the brightness sensor

    Galaxy S4 Active - Removing the brightness sensor 01
    Galaxy S4 Active - Removing the brightness sensor 02
    Galaxy S4 Active - Removing the brightness sensor 03
    1. A little plate holds the brightness sensor in the enclosure. The plate is hooked onto the enclosure. Using the steel laboratory spatula, carefully detach the plate.
    2. Remove the plate from the enclosure.
    3. Remove the brightness sensor.

    10. The right tools for your repair

    With the right tools, you will succeed in any repair. In our store you will find a large selection of professional quality tools.
    VIEW NOW

  10. Installing the brightness sensor

    Galaxy S4 Active - Installing the brightness sensor 01
    Galaxy S4 Active - Installing the brightness sensor 02
    1. Position the new brightness sensor in the enclosure.
    2. First stick the plate in the hollow next to the earpiece and then fold it down until it clicks into place on the other side.

  11. Installing the logic board

    Galaxy S4 Active - Installing the logic board 01
    Galaxy S4 Active - Installing the logic board 02
    Galaxy S4 Active - Installing the logic board 03
    1. Position the logic board in the enclosure.
    2. Make sure no plug connections get stuck under the logic board.
    3. The logic board is hooked onto the attachments for the rear camera and the vibration motor. Carefully push the logic board toward the top of the enclosure to click it into place.

  12. Connecting the connectors

    Galaxy S4 Active - Connecting the connectors 01
    Galaxy S4 Active - Connecting the connectors 02
    Galaxy S4 Active - Connecting the connectors 03
    Galaxy S4 Active - Connecting the connectors 04
    Galaxy S4 Active - Connecting the connectors 05
    Galaxy S4 Active - Connecting the connectors 06
    1. Connect the front camera to the logic board.
    2. Connect the logic board to the proximity sensor.
    3. Connect the brightness sensor.
    4. Connect the display.
    5. Connect the logic board to the antenna cable.
    6. Connect the sub-board.

  13. Installing the chassis

    Galaxy S4 Active - Installing the chassis 01
    Galaxy S4 Active - Installing the chassis 02
    Galaxy S4 Active - Installing the chassis 03
    Galaxy S4 Active - Installing the chassis 04
    Galaxy S4 Active - Installing the chassis 05
    Galaxy S4 Active - Installing the chassis 06
    Galaxy S4 Active - Installing the chassis 07
    1. The chassis isn’t just screwed onto the display. There are also little hooks keeping it in the display. Press on the chassis with your fingers to secure it on the display.
    2. Press the chassis firmly onto the entire device.

  14. Fastening the chassis screws

    Galaxy S4 Active - Fastening the chassis screws 01
    1. Attach the chassis with the twelve Phillips screws.
      12 x 3.9 mm Phillips screws

  15. Installing the four metal shields

    Galaxy S4 Active - Installing the four metal shields 01
    Galaxy S4 Active - Installing the four metal shields 02
    Galaxy S4 Active - Installing the four metal shields 03
    Galaxy S4 Active - Installing the four metal shields 04
    1. Using tweezers, put the four metal shields back on.
    2. Firmly press on each cover.

  16. Inserting the SIM and microSD cards

    Galaxy S4 Active - Inserting the SIM and microSD cards 01
    1. Insert the SIM card and the microSD card.

  17. Installing the battery

    Galaxy S4 Active - Installing the battery 01
    Galaxy S4 Active - Installing the battery 02
    Galaxy S4 Active - Installing the battery 03
    1. Put the battery in the Galaxy S4 Active.

  18. Attaching the back cover

    Galaxy S4 Active - Attaching the back cover 01
    Galaxy S4 Active - Attaching the back cover 02
    Galaxy S4 Active - Attaching the back cover 03
    Galaxy S4 Active - Attaching the back cover 04
    1. Position the back cover on the chassis.
    2. The back cover hooks onto the bottom of the chassis.
    3. Carefully press the back cover on all over so the retaining clips can click into place.
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