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Repair guides and disassembly information for Google's Pixel 4 smartphone, released in October of 2019.

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Replaced battery, but now wireless charging isn't working properly

Hi,

This weekend I swapped out the battery in my Pixel 4, which went pretty smoothly. I don't think I damaged anything internal in the process. However, since then I have noticed that wireless charging isn't working properly.

When placed on the charging pad, the phone starts to charge just fine. But then a few minutes or even an hour later, the charging pad is no longer recognised.

If I take the phone off the pad and place it back on, nothing happens. However, if I take it off the pad and squeeeeze it, as if I'm forcing the back of the device to stick better to its adhesive, I can put it back on the pad and it will be recognised again for a few minutes. As the wireless charging coil is attached to the back of the glass I don't see why this should help, but it does.

Does anyone have an idea of why this would happen - did I damage something internal without realising, or fail to put something back properly?

Thanks in advance for any help.

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I would refer to this article

As I quote from the repair guide:

  • When installing a new wireless charging coil pad, align the contacts with the residue outline left by the old adhesive.
  • If the contacts don't line up with the corresponding spring contacts on the motherboard, the wireless charging coil will not work properly.

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Thanks @yukamoran! I didn't replace the coil as part of my repairs, but I guess it makes sense that alignment of the coil is important.

I guess the back of the phone wasn't exactly aligned when I put it back on - after reseating it and then leaving the phone under some heavy books for some hours to help it sit in place, wireless charging seems to be working properly.

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Kieran will be eternally grateful.
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