Galaxy S8 - Replacing the sensors

1. Shut down your Galaxy S8 by pressing the power button until you see the option "Switch off".
2. Now you can confirm the shut down of the mobile phone. Start the next step as soon as the screen stays black.

1. Now remove the SIM tray including your card by using a SIM tool.

Now you have to release the back cover of the Galaxy S8. As this is glued, you will need a heat gun or a regular hairdryer. The heat will loosen the glue, so that you can remove the back cover more easily. In addition, you'll need a flat, flexible tool like the iPlastix or iFlex as well as several picks to remove the back cover all around.

1. Heat the back cover all around with a hair dryer to loosen the glue. Do not put the hair dryer too far away, you will need it again and again in between. Place a suction cup on the bottom of the back cover.
2. Pull the suction cup on the key ring upwards and try to press a flat tool like the iPlastix or iFlex between the back glass and the frame at the same time. You can always use the hair dryer to help you do this, so that the heat will loosen the glue at this point.

The iPlastix is made of plastic, which protects the frame from scratches. However, the tool is very soft and therefore difficult to insert.

The backcover is made of glass and will break easily. For this reason, be very careful when removing the back cover. If necessary, use the hair dryer and the flat tool again and again. This step may take you more time than you think - even experts need up to half an hour to remove the back cover. So take some time to complete this step to make sure you don't break anything.

1. Once you have managed to insert the flat tool between the back glass and the frame, you now insert a plectrum into the gap. This way the gap remains open and you can take out your tool again.
2. Repeat this along the entire edge. Pull the tool through the gap to loosen the glue bit by bit.
3. In between you can always reach for a hair dryer. Re-heat the area you are working on. In this way, you will gradually insert the other picks.

On the lower side the backcover is more strongly glued than on the other places.

1. The fingerprint sensor is connected with a cable under the camera. Therefore, lift the back cover very slightly once you have loosened it everywhere.

1. After loosening the back cover and carefully lifting it up, disconnect the fingerprint sensor from the spudger.
2. Now the back cover is completely detached - you can lift it off and put it aside.

• 14 × 3,6 mm Phillips Schraube

1. Take out the 14 screws that connect the midframe to the display.

If you have problems because the screws get stuck, a tweezer will help.

1. The cover of the NFC antenna is slightly glued. Take again the hot air device or the hair dryer to warm up the place.
2. Now carefully put a flat tool under the antenna to remove it. Note that the cover is hooked onto the housing.
3. Take out the middle cover.

• Battery Connector

1. Carefully disconnect the connector of the battery by using a spudger. Be sure to use a plastic spudger to avoid a short circuit.

1. Using tweezers or another flat tool, you can loosen and remove the speaker.

1. Using the spudger, carefully disconnect the highlighted contacts from the motherboard.

Make sure not the damage the motherboard when removing the antenna cable.

1. Now you can carefully remove the motherboard. Make sure it’s not caught on the connectors you already disconnected.
2. The USB port is still connected to the back of the board. Once you’ve lifted the board, you can use the spudger to disconnect this connector.
3. Then set the board aside in a safe place.

The sensor contains several devices, such as the proximity sensor and the RGB LED indicator.

1. The sensor cable is also glued to the display. Use a flat tool to carefully remove the sensor cable and avoid damaging it.
2. Now you can take out the flex cable using tweezers.

1. Put the sensor cable back into the chassis.
2. Press down the sensor using a finger to glue it in.

Now you can put the motherboard back in.

1. First connect the connector on the back side of the motherboard.
2. Now you can put the motherboard back in the chassis. Make sure no cables or connectors get stuck under the board.

1. Now connect the marked contacts to the board again.

1. The speaker is placed at the bottom of the body.
2. It should snap into it. To do this, press it gently with your fingers.

1. Now it is time to reconnect the battery to the circuit board. To do this, you have to press the connector until you hear a click. Then you know that the connection is locked.

1. To place the middle cover correctly in the housing of your Galaxy S8, place it on the board.
2. Now place the top cover with the antenna back into the body. For this you have to hook it on the upper side.
3. The cover has to snap in gently all around - help with your fingers and press it slightly.

• 14 × 3,6 mm Phillips Schraube

1. Fix all 14 screws.

1. Place the back in the original place.
2. Connect the fingerprint sensor again.
3. Now press the back cover on the whole surface so that the adhesive surface can re-attach.

So that the original glue lasts better, you can warm up your phone again with a hair dryer. If you then clamp the Galaxy S8 or weigh it down with some books, you can further optimise the result.

1. Now you have to put the SIM card holder back into your Galaxy S8. The slide must be aligned correctly.