Galaxy A51 - Replacing the display

  • Galaxy A51
  • 27 Steps
  • Medium
Go to the guide

Your Samsung Galaxy A51 has a cracked display? The touch screen does not work anymore?

No worries. In this detailed step-by-step guide, we explain how you can replace the defective display of your Galaxy A51 on your own.

As the backcover of the A51 is made of plastic, the probability of damaging it during repair is low. This means that even repair novices can easily replace the display without hesitation.

We wish you much success with your repair! You can find the right original replacement display for your Galaxy A51 as well as the right Samsung tool kit in our online store.

If you found our instructions helpful, we would be pleased to receive a positive evaluation.


Required tools

  • Tool for prying out batteries

    Tool for prying out batteries

    You have to use a very stable tool to pry out the battery. At the same time, it has to be flat enough to insert below the battery.

    €2.00 at the iDoc store
  • Flat Picks

    Flat Picks

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

    €2.00 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 €14.47 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
  • iFlex opening tool

    iFlex opening tool

    Opening your smartphone can be a very delicate operation, especially if the glue is very persistent. The blade of the flexible but sturdy iFlex measures just 0.15 mm, so it fits in even the smallest gaps, such as between the screen and the frame. The practical iFlex is made of stainless steel and sits comfortably in the hand. This makes it the perfect assistant for every smartphone repair.

    €10.00 at the iDoc store
  • iPlastix

    iPlastix

    Do you want to open your smartphone or lever out large parts like the battery? Then the iPlastix with its large blade will help you. The practical assistant is made of flexible, especially sturdy plastic and lies comfortably in the hand. Thanks to its design, you can even get into smaller gaps, for example to lift the screen or to prevent it from sticking together again.

    €10.00 at the iDoc store
  • Tweezers

    Tweezers

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

    €10.00 at the iDoc store
  • SIM Tool

    SIM Tool

    If you want to use a different SIM card or repair most parts of your Apple devices, you’ll have to remove the SIM card first. The SIM card tray only comes out if you insert a tool with a very fine point into the small hole next to the SIM card slot. This tool is designed especially for ejecting the SIM card from all iPhones and iPads, and fits perfectly into the appropriate opening.

    €2.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

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

    €2.00 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.

    €13.00 at the iDoc store

Required replacement part

Show all replacement parts for the Galaxy A51 

Replacement parts and tools for this repair

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

Getting started with the repair of your Galaxy A51

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

27 steps
  1. Switching off your Samsung Galaxy A51

    Galaxy A51 - Switching off your Samsung Galaxy A51 01
    Galaxy A51 - Switching off your Samsung Galaxy A51 02
    Galaxy A51 - Switching off your Samsung Galaxy A51 03

    We recommend that you use our checklist to test the basic functions of your phone before repair. This way you can rule out the possibility that anything has been damaged during the repair. Afterwards you have to switch off your A51 to avoid a potential short circuit.

    1. To do this, first press and hold the side and volume down key simultaneously for a few seconds.
    2. Tap on "Switch off" in the displayed menu.
    3. Your phone will now shut down completely within a few seconds.
  2. Heating up the back cover

    Galaxy A51 - Heating up the back cover 01
    Galaxy A51 - Heating up the back cover 02
    Used tools

    The Galaxy A51 is opened via the firmly adhered plastic back cover. To remove it, you first have to heat the adhesive film with hot air. Use a hot air device such as a heat gun or a regular hair dryer.

    1. First, place your phone face down on a soft, clean surface.
    2. Move the hot air device evenly over the edge of the back cover.

    A rule of thumb: The edge of the back cover should only be heated up to a point where you can still touch it without getting your fingers burned.The top and bottom edges of the back cover are glued especially tightly together.


    Used tools
  3. Lifting up the back cover

    Galaxy A51 - Lifting up the back cover 01
    Galaxy A51 - Lifting up the back cover 02
    Galaxy A51 - Lifting up the back cover 03
    Galaxy A51 - Lifting up the back cover 04
    Used tools

    Once the edge of the back cover has warmed up sufficiently, you can start to carefully remove it from the middle frame.

    Opening the Galaxy A51 will void the manufacturer's warranty.

    1. Place a suction cup in the lower part of the back cover and pull it slowly upwards to create a narrow gap between back cover and middle frame.
    2. At the same time try to insert a flat, stable tool into the gap and enlarge it. We recommend the iFlex and flat plastic picks for this.

    The iFlex is made of very thin, stable metal and has sharp edges.To avoid scratching the frame of your device, we recommend that you start with the iFlex at this stage and continue as early as possible with a flat plastic pick.The easiest way to insert the tool is to place it in one of the two corners of the lower frame of your device.

    Used tools
  4. Detaching the back cover

    Galaxy A51 - Detaching the back cover 01
    Galaxy A51 - Detaching the back cover 02
    Galaxy A51 - Detaching the back cover 03
    Galaxy A51 - Detaching the back cover 04
    Used tools

    Be careful not to insert your tool too far into the device to avoid damaging components.

    1. Once a gap is created, remove the back cover from the middle frame piece by piece by moving the tool along the edge of the back cover.
    2. Press it upwards at the same time to release it from the middle frame.

    At regular intervals, place flat picks at the loosened points of the back cover frame so that the adhesive cannot rebond. For this, turn the picks from the pointed side to their broad side.

    Warm up the glue with hot air at regular intervals to make it easier to loosen.
    1. One the back cover is entirely detached, put it aside.
    Used tools
  5. Removing the SIM tray

    • 13 × 3.5 mm Phillips

    The middle frame is not glued, but firmly hooked into the display unit with plastic lugs.

    1. First loosen all screws that fix the middle frame to the display with a Phillips screwdriver.

    For the storage of loosened screws and small components it is advisable to use a screw storage box. We recommend our magnetic pad for this purpose. On this pad, the removed components can be arranged in the same way as they were installed in the telephone.

    1. In the next step, remove the SIM tray from the middle frame by pressing with a SIM tool, or another pointed object into the small round opening next to it.


  6. Removing the middle frame

    Galaxy A51 - Removing the middle frame 01
    Galaxy A51 - Removing the middle frame 02
    Galaxy A51 - Removing the middle frame 03
    Galaxy A51 - Removing the middle frame 04
    Used tools
    1. Now turn your A51 upside down with the screen facing up.
    2. Attach a suction cup to the lower edge of the display and pull it upwards.
    3. At the same time insert a flat, stable tool between the display unit and the center frame to create a gap. We use the iFlex initially, and then the iPlastix.

    The iPlastix is particularly suitable for loosening the middle frame. It is made of sturdy, flexible plastic, so you can insert it easily without scratching the edge of the display. The easiest way to detach the display unit from the middle frame is to insert the iPlastix into one of the two corners at the bottom edge of the display.

    Take care not to insert your tool too deeply to avoid damaging anything on the inside of the display unit.

    1. Run the tool once around the display edge and press it upwards to release the plastic lugs of the middle frame.
    2. Put the middle frame away and the display unit in front of you with the display screen facing down.
    Used tools
  7. Disconnecting the battery

    Galaxy A51 - Disconnecting the battery 01
    Galaxy A51 - Disconnecting the battery 02
    Galaxy A51 - Disconnecting the battery 03
    Used tools
    • Connector

    To prevent a short circuit during the repair, you must disconnect the battery from the mainboard as soon as possible.

    When detaching the battery connector make sure that you start from the side where there are no small components on the board. This will prevent possible damage.

    1. Use a sturdy plastic lever tool to slide under the battery connector and carefully lift it off. We recommend a handy plastic spudger for this purpose.
    Used tools
  8. Detaching the flex cabel

    Galaxy A51 - Detaching the flex cabel 01
    Galaxy A51 - Detaching the flex cabel 02
    Galaxy A51 - Detaching the flex cabel 03
    Galaxy A51 - Detaching the flex cabel 04
    Used tools
    • Connector

    Above the battery runs a flex cable that connects the mainboard and the USB board.

    When detaching the flex cable connectors make sure that you start from the side where there are no small components on the board. This way you avoid possible damage.

    1. Use the plastic spudger to move under the flex cable connectors one after the other, and carefully lift them off.
    2. Then put the detached flex cable aside.
    Used tools
  9. Removing the battery

    Galaxy A51 - Removing the battery 01
    Galaxy A51 - Removing the battery 02
    Galaxy A51 - Removing the battery 03
    Used tools

    The battery is glued in the display unit over a wide area. In order to remove it, you must first heat the glue with hot air.

    Never heat the heat-sensitive battery directly, but always from the side of the display only .When removing the battery, take care not to bend it or damage it otherwise.

    1. Turn your phone upside down with the display facing up and move hot air evenly over the area where the battery is located.
    2. Turn the display unit over again and use a sturdy plastic tool to slide it under one edge of the battery to gently lift it up. We use the battery spudger for this.
    3. If the battery is slightly loosened, you can use a flat, flexible tool such as the iPlastix to slide it under the battery to completely detach it from the display unit.
    Used tools
  10. Removing the mainboard

    • Connector
    • 1 × 3.0 mm Phillips

    The mobile phone antenna cable is attached to the mainboard. With a Phillips screw the board is connected to the display unit.

    1. First loosen the antenna cable from the board by carefully lifting the metal head of the cable upwards with a pair of tweezers.
    2. Take the detached antenna cable out of its guide and then loosen the single screw of the mainboard.
    3. You can easily remove the loosened mainboard from your device with your fingers.
  11. Removing the earpiece

    Galaxy A51 - Removing the earpiece 01
    Galaxy A51 - Removing the earpiece 02
    Used tools

    After removing the mainboard, the slightly glued earpiece can be removed from the display unit.

    1. Insert a pair of tweezers into the small opening on the right side of the earpiece and carefully lever the component out of its guide in the display unit.
    Used tools
  12. Detaching the display connector

    Galaxy A51 - Detaching the display connector 01
    Galaxy A51 - Detaching the display connector 02
    Galaxy A51 - Detaching the display connector 03
    Used tools
    • Connector

    Before the USB board can be removed, the display connector must be detached first.

    When detaching the display connector, make sure that you start from the side where there are no small components on the board. This way you avoid possible damage.

    1. Use a plastic spudger to attach to the display connector and carefully lift it off.
    Used tools
  13. Removing the fingerprint sensor

    • Connector
    • 2 × 2.9 mm Phillips

    The fingerprint sensor must also be removed before the USB board can be removed.

    When detaching the connector of the fingerprint sensor, make sure that you start from the side where there are no small components on the board. This will prevent possible damage.

    1. Use a plastic spudger to gently lever the fingerprint sensor connector off the USB board.
    2. Remove the two Phillips screws that attach the sensor to the USB board and then take it out.
  14. 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
  15. Removing the USB board

    Galaxy A51 - Removing the USB board 01
    Galaxy A51 - Removing the USB board 02
    Used tools

    If the display connector and the fingerprint sensor are disconnected, the USB board can be removed.

    1. Use a spudger to gently lift the USB board from the display unit and put it aside.
    Used tools
  16. Preparing the new display

    Galaxy A51 - Preparing the new display 01
    Verwendete Ersatzteile

    Before you can install your replacement display, you must prepare it.

    1. First remove all existing protective foils and seals from the new display.
    2. Then compare the replacement display with your old display to check whether any small components still need to be taken over.
    Verwendete Ersatzteile
  17. Inserting the USB board

    Galaxy A51 - Inserting the USB board 01
    Galaxy A51 - Inserting the USB board 02
    Used tools

    Now you can reinstall all removed components one after the other.

    Since we did not install a new replacement display for this manual, the following photos show the old display unit with adhesive residues.

    1. Start by placing the USB board in its original position and press it slightly.
    Used tools
  18. Inserting the fingerprint sensor

    • Connector
    • 2 × 2.9 mm Phillips

    Now insert the fingerprint sensor again.

    Never press the connector forcefully. Its damage may cause a complete breakdown of the fingerprint sensor.

    1. Place the sensor in its original position on the USB board.
    2. Attach the connector of the sensor by pressing it firmly until you feel it click into place.
    3. Screw the fingerprint sensor to the USB board with two Phillips screws.
  19. Attaching the display connector

    Galaxy A51 - Attaching the display connector 01
    Galaxy A51 - Attaching the display connector 02
    Galaxy A51 - Attaching the display connector 03
    • Connector

    Once the fingerprint sensor is back in place, you can also reconnect the display.

    Never press the connector forcefully. Its damage can lead to failure of the display.
    1. Now attach the display connector by gently pressing it until you feel it click into place.
  20. Inserting the earpiece

    Galaxy A51 - Inserting the earpiece 01
    Galaxy A51 - Inserting the earpiece 02
    Used tools

    Before installing the mainboard, the earpiece must be inserted.

    1. Put it back into its guide at the upper edge of the display and slightly press it.

    The shape of the guide will help you to align the earpiece correctly.

    Used tools
  21. Inserting the mainboard

    • Connector
    • 1 × 3.0 mm Phillips

    At this point you can insert the mainboard into the new display of your Galaxy A51.

    1. Put it back to its original position and fix it with the previously loosened screw.
    2. Using tweezers, push the antenna cable back into its guide at the edge of the display.
    3. Then attach the connector of the antenna cable to the mainboard.
  22. Inserting the battery

    Galaxy A51 - Inserting the battery 01
    Galaxy A51 - Inserting the battery 02
    Galaxy A51 - Inserting the battery 03
    Used tools

    The replacement display for the Galaxy A51 does not come with new adhesive strips to attach the battery. Usually, the adhesive residues on the back of the battery are sufficient to fix the battery securely in the display unit.

    Make sure that the adhesive residues do not form thick lumps. Clumped adhesive residues lead to uneven, unstable positioning of the battery and can have a negative effect on the entire device.

    If you want to be on the safe side, you can completely remove the adhesive residue and apply thin, double-sided adhesive tape to the back of the battery. We use our universal adhesive tape for this.

    1. Place the battery in its guide in the display unit and press it firmly so that the adhesive bonds.
    Used tools
  23. Connecting the flex cable

    Galaxy A51 - Connecting the flex cable 01
    Galaxy A51 - Connecting the flex cable 02
    Galaxy A51 - Connecting the flex cable 03
    • Connector

    After inserting the battery, the flex cable can be connected.

    1. Align the flex cable.

    The labels Main and Sub on the cable help you to align it correctly.

    1. Attach one connector each on the mainboard and the USB board.
  24. Connecting the battery

    Galaxy A51 - Connecting the battery 01
    Galaxy A51 - Connecting the battery 02
    • Connector

    Once the battery is inserted and the flex cable connected, the battery can be connected.

    1. Attach the battery connector by gently pressing it down.
  25. Installing the middle frame

    • 12 × 3.5 mm Phillips

    Once the battery is connected, the middle frame can be installed.

    Take care to align the middle frame correctly. The recess for the camera can be used for orientation.

    1. Place the middle frame on the display unit and press it firmly so that it locks into place from all sides.
    2. Then slide the SIM tray into the middle frame of your Galaxy A51.

    The printing on the SIM tray must point towards display.

    If the SIM tray does not slide in easily, the mainboard may not be seated properly.

    1. Finally fix the middle frame to the display unit with the Phillips screws.
  26. Test your Galaxy A51

    Galaxy A51 - Test your Galaxy A51 01
    Galaxy A51 - Test your Galaxy A51 02
    Galaxy A51 - Test your Galaxy A51 03

    Before you glue the back cover of your A51 again, you should test the functionality of the replacement display.

    1. Switch on your phone and enter *#0*# in the number field to access the Samsung test menu.
    2. For example, test whether the new display shows the colors correctly and whether the touch works everywhere on the display.

    You can also test other components, such as the vibration motor and speakers.

    1. If everything works as expected, you can close the device. If not, check again if everything is properly installed and connected.
  27. Attaching the adhesive frame

    Galaxy A51 - Attaching the adhesive frame 01
    Galaxy A51 - Attaching the adhesive frame 02
    Galaxy A51 - Attaching the adhesive frame 03
    Galaxy A51 - Attaching the adhesive frame 04
    Galaxy A51 - Attaching the adhesive frame 05
    Galaxy A51 - Attaching the adhesive frame 06
    Used tools
    Verwendete Ersatzteile

    Before you close your Galaxy A51 with the back cover again, you should attach a new adhesive frame. This way you make sure that it is closed properly.

    1. First remove all remains of the old adhesive frame from the inside of the back cover.
    2. Align the new frame with the back cover on trial.

    The corners of the adhesive frame are different and will help you align it correctly.

    1. Once the frame is correctly aligned, you can pull off the first protective film from the frame's bottom and press the frame on the edge of the back cover.

    A spudger will help you to attach the frame as smooth as possible.

    1. Now remove the two protective films from the top of the adhesive frame.
    2. Finally, remove the protective film from the edge as well, so that only the black adhesive film remains on the edge of the back cover.
    Used tools
    Verwendete Ersatzteile
  28. Installing the back cover

    Galaxy A51 - Installing the back cover 01
    Galaxy A51 - Installing the back cover 02
    Galaxy A51 - Installing the back cover 03
    Used tools

    Once the repair is complete, you still have to attach the back cover including a new adhesive frame to close your Samsung Galaxy A51.

    1. Position the back cover over the display unit and the middle frame.
    2. Press it evenly by running your fingers once along the entire edge of the back cover.
    3. Finally, heat the back cover again, and weigh it down for half an hour with some books, so that the glue can bond firmly again.
    Used tools
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