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简介

This repair guide was authored by the iFixit staff and hasn’t been endorsed by Google. Learn more about our repair guides here.

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

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

  1. Google Pixel 4a Motherboard Replacement, Eject the SIM card tray: 步骤 1 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Eject the SIM card tray: 步骤 1 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Eject the SIM card tray: 步骤 1 中的图像 3,3
    • 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. Google Pixel 4a Motherboard Replacement, Precautionary notes: 步骤 2 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Precautionary notes: 步骤 2 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Precautionary notes: 步骤 2 中的图像 3,3
    • 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.

    • Note the orange ribbon cable under the lower-right corner of the screen, which is susceptible to damage if your opening pick is pressed into it. Only insert your opening pick as little as is necessary to separate the screen adhesive.

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

    Coll down guys and gals.

    1) go below the Display and not between the backcover/middle (see the other comments)

    2) just take care about the flex/display cable position (which is iirc about on the middle i.e. 2nd 3rd from the bottom ON THE LEFT side dear OP)

    Everything else is just separting the glued on Display from the Phone.

    See the other comments

    Aleksandar Dejanovic - 回复

    Cool down guys and gals.

    1) go below the Display and not between the backcover/middle (see the other comments)

    2) just take care about the flex/display cable position (which is iirc about on the middle i.e. 2nd 3rd from the bottom ON THE LEFT side dear OP)

    Everything else is just separting the glued on Display from the Phone.

    See the other comments

    Aleksandar Dejanovic - 回复

    I've measured it: The cable starts arround 1.4-1.6 cm from the lower half from the bottom on the left side.

    So You can cut the bottom left corner and of course the upper left one but for safety's sake, watch out for the camera.

    You can go up to 5cm down from the upper left side till You're near the cable.

    Aleksandar Dejanovic - 回复

  3. Google Pixel 4a Motherboard Replacement, Heat the right edge of the screen: 步骤 3 中的图像 1,1
    • 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. Google Pixel 4a Motherboard Replacement, Insert an opening pick: 步骤 4 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Insert an opening pick: 步骤 4 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Insert an opening pick: 步骤 4 中的图像 3,3
    • 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.

    It's pretty easy. Insert it just below the screen between the Display and the Display “holder” or mold.

    Aleksandar Dejanovic - 回复

  5. Google Pixel 4a Motherboard Replacement, Guide the opening pick under the OLED panel: 步骤 5 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Guide the opening pick under the OLED panel: 步骤 5 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Guide the opening pick under the OLED panel: 步骤 5 中的图像 3,3
    • 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.

    This took me a while, I ended up sharpening the tip of the pick with a razor so I could push it through the seam and slicing a few times, heat->sharpen-> slice until I finally got it to move, and once it slid under carefully heated up areas and sliced with ~2mm of the pick.

    Alan Carlson - 回复

    This sounds also harder than it is. Push it in 1mm and just lift the other end in a wider angle like 70° degree from the horinzontal position. There “shouldn't” be much you can do wrong. Because except for the Data cable (flex) at a certain position, I can't remeber anything important but isolating tapes that I have scratched.

    It's just the Screen glued to the mold. That's it.

    Aleksandar Dejanovic - 回复

    Oh, and I wonder here where do You all get such thins plectrums? I have also the flat plastic version and the thin plastic cards but none of them were thin enough for this!!

    I ended up using the backside i.e. the dull side of a Razorblade. I didn't saw any alternatives to this. Did You hear this OP?

    Any!!

    Aleksandar Dejanovic - 回复

  6. Google Pixel 4a Motherboard Replacement, Cut the adhesive: 步骤 6 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Cut the adhesive: 步骤 6 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Cut the adhesive: 步骤 6 中的图像 3,3
    • 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. Google Pixel 4a Motherboard Replacement: 步骤 7 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 7 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 7 中的图像 3,3
    • 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.

    • There is a delicate cable under the bottom-right corner of the screen. If you feel your opening pick snag on anything, pull it out and try again. Make sure your pick is angled downward and only inserted as little as is necessary to separate the adhesive (no more than 3 mm deep).

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

  8. Google Pixel 4a Motherboard Replacement: 步骤 8 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 8 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 8 中的图像 3,3
    • 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. Google Pixel 4a Motherboard Replacement: 步骤 9 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 9 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 9 中的图像 3,3
    • There's a mesh covering the earpiece speaker on the top edge of the screen. If you don’t have a replacement mesh, take care not to damage or lose this component.

    • 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. Google Pixel 4a Motherboard Replacement: 步骤 10 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 10 中的图像 2,2
    • 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. Google Pixel 4a Motherboard Replacement, Flip the screen over: 步骤 11 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Flip the screen over: 步骤 11 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Flip the screen over: 步骤 11 中的图像 3,3
    • 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. Google Pixel 4a Motherboard Replacement, Disconnect the display: 步骤 12 中的图像 1,1
    • 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.

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

    • Throughout this repair, keep track of each screw and make sure it goes back exactly where it came from.

  13. Google Pixel 4a Motherboard Replacement: 步骤 14 中的图像 1,1
    • Use a pair of tweezers to remove the screen connector bracket.

    • Make sure to keep this component to reinstall it during reassembly.

  14. Google Pixel 4a Motherboard Replacement: 步骤 15 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 15 中的图像 2,2
    • 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.

    No, why the tip? Use the other flat side that doesn't concetrate all the power on one point and Youre doing a propper job.

    Aleksandar Dejanovic - 回复

  15. Google Pixel 4a Motherboard Replacement, Remove the screen: 步骤 16 中的图像 1,1
    • 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.

    • If you use isopropyl alcohol to clean the adhesive off the display, be sure to not let it splash onto any unintended components, as this can weaken their adhesive bond.

    • During the boot-up process after reassembly, the screen will go through a calibration sequence. Do not touch the screen during this process, as it could result in improper touch calibration and create touch issues.

    This step seems to imply that a screen replacement is necessary when replacing the charging port. Is the charging port replaceable without replacing the screen? I understand great care must be taken not to damage the original screen in the procedure, but can it be reinstalled?

    David-Alexandre Tremblay - 回复

    Yes, it can be reinstalled.

    Sam Omiotek -

    How long does the calibration process typically take? What does this process look like?

    phelpsbc - 回复

  16. Google Pixel 4a Motherboard Replacement, Remove the midframe screws: 步骤 17 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the midframe screws: 步骤 17 中的图像 2,2
    • Use a T3 Torx driver to remove the eight 4.3 mm screws securing the back cover to the midframe.

  17. Google Pixel 4a Motherboard Replacement, Separate the back cover from the midframe: 步骤 18 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Separate the back cover from the midframe: 步骤 18 中的图像 2,2
    • 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.

  18. Google Pixel 4a Motherboard Replacement: 步骤 19 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 19 中的图像 2,2
    • Slide the opening pick around the left edge of the phone to release the plastic clips securing the back cover to the midframe.

  19. Google Pixel 4a Motherboard Replacement: 步骤 20 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 20 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 20 中的图像 3,3
    • Slide the opening pick around the top and right edges of the phone to release the rest of the clips.

  20. Google Pixel 4a Motherboard Replacement: 步骤 21 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 21 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 21 中的图像 3,3
    • 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.

  21. Google Pixel 4a Motherboard Replacement, Remove the motherboard bracket: 步骤 22 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the motherboard bracket: 步骤 22 中的图像 2,2
    • 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

  22. Google Pixel 4a Motherboard Replacement: 步骤 23 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 23 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 23 中的图像 3,3
    • Use the tip of a spudger to unclip the motherboard bracket from the upper-right and lower-right corners of the motherboard.

  23. Google Pixel 4a Motherboard Replacement: 步骤 24 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 24 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 24 中的图像 3,3
    • Use a pair of tweezers to remove the motherboard bracket.

  24. Google Pixel 4a Motherboard Replacement, Disconnect the battery: 步骤 25 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Disconnect the battery: 步骤 25 中的图像 2,2
    • Use the flat end of a spudger to pry up and disconnect the battery cable.

  25. Google Pixel 4a Motherboard Replacement, Remove the back cover: 步骤 26 中的图像 1,3 Google Pixel 4a Motherboard Replacement, Remove the back cover: 步骤 26 中的图像 2,3 Google Pixel 4a Motherboard Replacement, Remove the back cover: 步骤 26 中的图像 3,3
    • Use the tip of a spudger to disconnect the two flex cables connecting the fingerprint sensor and buttons to the motherboard.

  26. Google Pixel 4a Motherboard Replacement: 步骤 27 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 27 中的图像 2,2
    • Remove the back cover.

  27. Google Pixel 4a Motherboard Replacement, Remove the headphone jack: 步骤 28 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the headphone jack: 步骤 28 中的图像 2,2
    • Use the tip of a spudger to disconnect the headphone jack cable from the motherboard.

  28. Google Pixel 4a Motherboard Replacement: 步骤 29 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 29 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 29 中的图像 3,3
    • Insert an opening pick under the headphone jack and twist to release it from the adhesive securing it to the midframe.

    • Remove the headphone jack.

  29. Google Pixel 4a Motherboard Replacement, Remove the front-facing camera: 步骤 30 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the front-facing camera: 步骤 30 中的图像 2,2
    • Pry up with the flat end of a spudger to disconnect the front-facing camera from the motherboard.

  30. Google Pixel 4a Motherboard Replacement: 步骤 31 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 31 中的图像 2,2
    • Use a pair of tweezers to remove the front-facing camera.

  31. Google Pixel 4a Motherboard Replacement, Remove the loudspeaker: 步骤 32 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the loudspeaker: 步骤 32 中的图像 2,2
    • Use a T3 Torx driver to remove the two 4.1 mm screws securing the loudspeaker assembly.

  32. Google Pixel 4a Motherboard Replacement: 步骤 33 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 33 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 33 中的图像 3,3
    • Insert the tip of a spudger underneath the loudspeaker assembly.

    • Be careful not to puncture the white membrane on either side of the speaker if you are intending to reuse it.

    • Flip the loudspeaker assembly over so it lightly rests on top of the battery.

  33. Google Pixel 4a Motherboard Replacement: 步骤 34 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 34 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 34 中的图像 3,3
    • Use the tip of a spudger to disconnect the antenna flex cable from the loudspeaker assembly.

  34. Google Pixel 4a Motherboard Replacement: 步骤 35 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 35 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 35 中的图像 3,3
    • Carefully peel the loudspeaker assembly up off of the tape underneath it.

    • Be careful not to puncture the white membrane on either side of the speaker if you are intending to reuse it.

    • Remove the loudspeaker assembly.

  35. Google Pixel 4a Motherboard Replacement, Disconnect the loudspeaker cable: 步骤 36 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Disconnect the loudspeaker cable: 步骤 36 中的图像 2,2
    • Use the tip of a spudger to disconnect the loudspeaker cable from the motherboard.

    Be careful on this step. I ended up popping out part of the clip housing (I may be able to repair once I look at it with a magnifying glass). Maybe the flat side of the spudger would be better.

    Alan Carlson - 回复

  36. Google Pixel 4a Motherboard Replacement, Remove the motherboard screws: 步骤 37 中的图像 1,1
    • Use a T3 Torx driver to remove the three screws securing the motherboard:

    • Two 2.9 mm-long black screws

    • One 2.1 mm-long screw

  37. Google Pixel 4a Motherboard Replacement, Remove the earpiece speaker tape: 步骤 38 中的图像 1,1
    • Use the corner of an opening pick to peel up the tape covering the earpiece speaker.

  38. Google Pixel 4a Motherboard Replacement: 步骤 39 中的图像 1,3 Google Pixel 4a Motherboard Replacement: 步骤 39 中的图像 2,3 Google Pixel 4a Motherboard Replacement: 步骤 39 中的图像 3,3
    • Use a pair of tweezers to completely remove the tape covering the earpiece speaker.

    • It is not required to reinstall this tape during reassembly.

  39. Google Pixel 4a Motherboard Replacement, Remove the motherboard: 步骤 40 中的图像 1,2 Google Pixel 4a Motherboard Replacement, Remove the motherboard: 步骤 40 中的图像 2,2
    • Insert the tup of a spudger underneath the bottom edge of the motherboard and pry it up enough to grip it with your fingers.

  40. Google Pixel 4a Motherboard Replacement: 步骤 41 中的图像 1,2 Google Pixel 4a Motherboard Replacement: 步骤 41 中的图像 2,2
    • Remove the motherboard.

结论

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings 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等其他人完成本指南。

Sam Omiotek

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4条评论

Longshot here… I dropped my phone and it appears to be dead, although no physical signs of damage. Right after it happened, I could see an image on the screen but it was frozen, so I pressed the power button and the screen turned off, and then I wasn’t able to turn it back on from then on. There are no signs of life at all… no lights, no vibrations, no sounds. If I plug it into my computer, nothing happens. So totally dead. I already opened it up and checked for any obvious damage to internal components or loose cables. Didn’t find any smoking guns, so I just tried disconnecting and re-connecting all the ribbon cables. Still no success. I’m wondering if you have any thoughts on whether a battery or motherboard replacement might bring my phone back to life, and if so, if you have any thoughts on one or the other. My initial thought is that’s it more likely that something on the motherboard got damaged from a physical drop vs. the battery, but any other input you could offer would be great.

Sally Hoo - 回复

That’s a tough one Sally… I can’t guarantee replacing any certain component will fix your phone given the information. Disconnecting and reconnecting the cables was a good idea. No signs of life at all suggests to me it’s likely the battery or motherboard, like you said.

If it’s still under warranty see if Google will replace it, they replaced my pixel 3 twice when it bricked for no apparent reason. If it’s not then I think the best course of action would be to meticulously search for the damage starting with the motherboard. Use a magnifying glass. Even if a single tiny transistor popped off that would be enough to brick it. If you can’t find anything, you’ll have to take a chance replacing one part at a time until you get it working again.

Good luck!

Sam Omiotek -

Hey there, probably no fix to this, but I went swimming in a salt water pool with my 4a on accident and the repair store said the motherboard was fried and unrepairable. Is there any chance that I can still get data off the phone?

Nate Waters - 回复

Unfortunately, even if you disassemble your phone clean it in an ultrasonic bath, then replace the battery, you’d still have to be very lucky for it to power back on with data intact.

Sam Omiotek -

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