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Inleiding

Follow this guide to replace the back cover on a Google Pixel 4a.

The unreinforced display panel of the google Pixel 4a is fragile. Pay special attention to the warnings in the opening procedure if you are reusing the screen.

  1. Insert a SIM eject tool, bit, or straightened paper clip into the SIM tray hole. Press directly into the hole to eject the SIM card tray. Remove the SIM card tray.
    • Insert a SIM eject tool, bit, or straightened paper clip into the SIM tray hole.

    • Press directly into the hole to eject the SIM card tray.

    • Remove the SIM card tray.

  2. You will need to pry the screen up to remove it from the phone. Read the following notes carefully before proceeding. Take note of the two seams on the edge of the phone: Screen seam: This seam separates the screen from the rest of the phone. This is where you should pry.
    • You will need to pry the screen up to remove it from the phone. Read the following notes carefully before proceeding.

    • Take note of the two seams on the edge of the phone:

    • Screen seam: This seam separates the screen from the rest of the phone. This is where you should pry.

    • Frame seam: This is where the plastic frame meets the back cover. It is held in place by screws. Do not pry at this seam.

    • Before you begin, note the following areas on the screen:

    • Screen flex cable: Do not insert the opening pick deeper than instructed or you risk damaging this cable.

    • Adhesive perimeter: Prying beyond this narrow perimeter without angling the pick will damage the OLED panel.

  3. Apply a heated iOpener to the right edge of the display for one minute to soften the adhesive.
    • Apply a heated iOpener to the right edge of the display for one minute to soften the adhesive.

    • A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

  4. If your display is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the broken screen. Place a suction cup as close to the right edge of the screen as possible. Lift the suction cup with a strong steady force.
    • If your display is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the broken screen.

    • Place a suction cup as close to the right edge of the screen as possible.

    • Lift the suction cup with a strong steady force.

    • Insert the tip of an opening pick into the screen seam no more than 1 mm.

  5. This step shows how to insert the pick without damaging the OLED panel. Do this before beginning to slice the adhesive. With the pick 1 mm into the gap, pivot the pick upwards to a steep angle. At a steep angle, carefully push the pick into the gap about 1/4 inch (6 mm). The pick should slide in below the OLED panel.
    • This step shows how to insert the pick without damaging the OLED panel. Do this before beginning to slice the adhesive.

    • With the pick 1 mm into the gap, pivot the pick upwards to a steep angle.

    • At a steep angle, carefully push the pick into the gap about 1/4 inch (6 mm). The pick should slide in below the OLED panel.

    • Stop if you feel the point of the pick hitting a ridge. The pick may be pressing against the edge of the OLED panel. Angle the pick and try again.

  6. Slide the pick along the right edge of the screen to cut the adhesive. Do not insert the pick more than 1/4 inch (6 mm) or you may damage the screen's flex cable. Leave the pick in the top right corner to prevent the adhesive from re-sealing.
    • Slide the pick along the right edge of the screen to cut the adhesive.

    • Do not insert the pick more than 1/4 inch (6 mm) or you may damage the screen's flex cable.

    • Leave the pick in the top right corner to prevent the adhesive from re-sealing.

  7. The screen adhesive is very weak and you should not need to re-apply heat. If the screen does feel hard to slice, apply heat to the difficult area for one minute and try again. Insert another opening pick into the right  edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel. Slide the opening pick around the bottom of the phone to cut the adhesive.
    • The screen adhesive is very weak and you should not need to re-apply heat. If the screen does feel hard to slice, apply heat to the difficult area for one minute and try again.

    • Insert another opening pick into the right edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel.

    • Slide the opening pick around the bottom of the phone to cut the adhesive.

    • Leave the pick inserted along the bottom edge to prevent the adhesive from resealing.

  8. Insert another opening pick into the bottom edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel. Use the pick to slice through the left edge of the phone. If the screen feels hard to slice, heat the left edge for one minute and try again.
    • Insert another opening pick into the bottom edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel.

    • Use the pick to slice through the left edge of the phone.

    • If the screen feels hard to slice, heat the left edge for one minute and try again.

    • Leave the pick inserted along the left edge of the phone to prevent the adhesive from re-sealing.

  9. Insert another opening pick into the left edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel. Slide the pick around the top edge of the phone to cut the adhesive. If the screen feels hard to slice, heat the top edge for one minute and try again.
    • Insert another opening pick into the left edge of the phone at an angle where a gap has already formed to prevent damage to the OLED panel.

    • Slide the pick around the top edge of the phone to cut the adhesive.

    • If the screen feels hard to slice, heat the top edge for one minute and try again.

  10. Once you have cut around the perimeter of the phone, carefully lift the right edge of the screen, opening the phone like a book. Do not remove the screen yet.
    • Once you have cut around the perimeter of the phone, carefully lift the right edge of the screen, opening the phone like a book.

    • Do not remove the screen yet.

    • Use an opening pick to carefully cut through any remaining adhesive.

  11. Lift from the top edge and swing the screen over the bottom edge until you can rest it glass-side down. Be careful not to put any stress on the attached ribbon cable. Be careful not to put any stress on the attached ribbon cable.
    • Lift from the top edge and swing the screen over the bottom edge until you can rest it glass-side down.

    • Be careful not to put any stress on the attached ribbon cable.

  12. Use a pair of tweezers to carefully peel up the black tape covering the screen connector bracket.
    • Use a pair of tweezers to carefully peel up the black tape covering the screen connector bracket.

    • If it is in good condition, you can re-use this tape during reassembly. Otherwise, replace it with a piece of electrical tape.

  13. Use a T3 Torx driver to remove the two 2.1 mm screws securing the screen connector bracket.
    • Use a T3 Torx driver to remove the two 2.1 mm screws securing the screen connector bracket.

  14. Use a pair of tweezers to remove the screen connector bracket.
    • Use a pair of tweezers to remove the screen connector bracket.

  15. Use the tip of a spudger to pry up and disconnect the screen flex cable. To re-attach press connectors like this one, carefully align and press down on one side until it clicks into place, then repeat on the other side. Do not press down on the middle. If the connector is misaligned, the pins can bend, causing permanent damage.
    • Use the tip of a spudger to pry up and disconnect the screen flex cable.

    • To re-attach press connectors like this one, carefully align and press down on one side until it clicks into place, then repeat on the other side. Do not press down on the middle. If the connector is misaligned, the pins can bend, causing permanent damage.

  16. Remove the screen.
    • Remove the screen.

    • Compare your replacement screen with the original. You may need to transfer additional components (such as speaker mesh) to the new part.

    • To install the new screen:

    • Scrape off remaining adhesive from the perimeter of the frame.

    • Follow this guide if you are using custom-cut adhesives.

    • If you are using double-sided tape such as Tesa tape, follow this guide.

  17. Use a T3 Torx driver to remove the eight 4.3 mm screws securing the back cover to the midframe. Use a T3 Torx driver to remove the eight 4.3 mm screws securing the back cover to the midframe.
    • Use a T3 Torx driver to remove the eight 4.3 mm screws securing the back cover to the midframe.

  18. Insert an opening pick into the seam between the midframe and the back cover. Slide the opening pick along the bottom edge of the phone to release the plastic clips securing the back cover to the midframe.
    • Insert an opening pick into the seam between the midframe and the back cover.

    • Slide the opening pick along the bottom edge of the phone to release the plastic clips securing the back cover to the midframe.

  19. Slide the opening pick around the left edge of the phone to release the plastic clips securing the back cover to the midframe. Slide the opening pick around the left edge of the phone to release the plastic clips securing the back cover to the midframe.
    • Slide the opening pick around the left edge of the phone to release the plastic clips securing the back cover to the midframe.

  20. Slide the opening pick around the top and right edges of the phone to release the rest of the clips. Slide the opening pick around the top and right edges of the phone to release the rest of the clips. Slide the opening pick around the top and right edges of the phone to release the rest of the clips.
    • Slide the opening pick around the top and right edges of the phone to release the rest of the clips.

  21. Carefully swing the back cover from the bottom of the phone over the top and around the back. Lay the back cover on the work surface and lightly rest the midframe on the back cover, being careful not to put any stress on the attached ribbon cables. Lay the back cover on the work surface and lightly rest the midframe on the back cover, being careful not to put any stress on the attached ribbon cables.
    • Carefully swing the back cover from the bottom of the phone over the top and around the back.

    • Lay the back cover on the work surface and lightly rest the midframe on the back cover, being careful not to put any stress on the attached ribbon cables.

  22. Use a T3 Torx driver to remove the seven screws securing the motherboard bracket: Three 2.9 mm-long black screws
    • Use a T3 Torx driver to remove the seven screws securing the motherboard bracket:

    • Three 2.9 mm-long black screws

    • Three 2 mm-long screws

    • One 4.1 mm-long screw

  23. Use the tip of a spudger to unclip the motherboard bracket from the upper-right and lower-right corners of the motherboard. Use the tip of a spudger to unclip the motherboard bracket from the upper-right and lower-right corners of the motherboard. Use the tip of a spudger to unclip the motherboard bracket from the upper-right and lower-right corners of the motherboard.
    • Use the tip of a spudger to unclip the motherboard bracket from the upper-right and lower-right corners of the motherboard.

  24. Use a pair of tweezers to remove the motherboard bracket. Use a pair of tweezers to remove the motherboard bracket. Use a pair of tweezers to remove the motherboard bracket.
    • Use a pair of tweezers to remove the motherboard bracket.

  25. Use the flat end of a spudger to pry up and disconnect the battery cable. Use the flat end of a spudger to pry up and disconnect the battery cable.
    • Use the flat end of a spudger to pry up and disconnect the battery cable.

  26. Use the tip of a spudger to disconnect the two  flex cables connecting the fingerprint sensor and buttons to the motherboard. Use the tip of a spudger to disconnect the two  flex cables connecting the fingerprint sensor and buttons to the motherboard. Use the tip of a spudger to disconnect the two  flex cables connecting the fingerprint sensor and buttons to the motherboard.
    • Use the tip of a spudger to disconnect the two flex cables connecting the fingerprint sensor and buttons to the motherboard.

  27. Remove the back cover. Remove the back cover.
    • Remove the back cover.

Conclusie

Compare your new replacement part to the original part—you may need to transfer remaining components from the new part before installing.

To reassemble your device, follow the above steps in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

3 andere personen hebben deze handleiding voltooid.

Sam Omiotek

Lid sinds: 25-02-19

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T3 driver is too small. T4 driver fits all screws perfectly.

leehall - Antwoord

(T3 worked for me)

The back cover I bought didn't include the sensors (fingerprint and camera flash) and a grommet thing over one of the speaker holes, that are attached to the back cover. So I had to transfer those pieces myself. I needed to use heat from the iOpener to soften glue that was holding them on to the old back. The replacement back seemed to have replacement glue in place under peel tape. I didn't replace the glue holding the screen, instead heated everything up with the iOpener when replacing the screen in the hope that the old glue will still work, fingers crossed.

I suggest following this other guide instead, to replace the fingerprint sensor, is the same with two extra steps (but still need to swap the flash and ‘speaker grommet thingy' as well as the fingerprint sensor):

Google Pixel 4a Fingerprint Sensor Replacement

Don Barthel - Antwoord

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