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2012年11月2日に発売された第四世代のiPadです。16、32、64GBモデルがあります。モデル番号はA1458です。

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Failing: sleep, rotation, headphone, mic, cams and some weird stuff

I have bought this cheap iPad 4 use as a home automation center, mounted on the wall. The description stated it had a few defects, which I thought I could get over. Upon closer inspection some more things are wrong with it:

  • Touch screen was flakey (ribbon cable was sheared)
  • Sleep by pressing the power button is not working, not even from assistive touch. Hold to power down ís working
  • Screen rotation: not working, does work from assistive touch. Screen lock switch is working, so are the volume buttons
  • Headphone jack: only some loud pops and light noise
  • Microphone: no input (Siri cannot hear me)
  • Cameras: both front and back camera show only black
  • Apps from the app store cannot be installed: after pressing “Install”, spinner keeps on spinning without any popup
  • Apps cannot be deleted: long press does bring up wobbly icons and the ‘X’, but pressing the X does nothing
  • After the first boot, the screen stays black. You can tell it is on because when initiating Siri (home long-press) or taking a screenshot, you can hear the corresponding sounds. After a reset (home + power long press), you can get to the home screen by pressing the home button (the home screen does not show itself automatically)

I already replace the touch screen (working OK now), home button and WiFi cable. I can see no damage to the logic board, and judging by the screws, it has not been removed.

I was thinking about replacing the headphone jack assembly, since this connects all the components which are (partly) failing: iPad 3/4 Wi-Fi Headphone Jack

The hardware issues seem logically connected to this part, but I have no clue about the seemingly software-related issues.

Any ideas that replacing this part will fix my hardware and/or software issues? Thanks for any input.

Edit: FIXED

Everything is fixed after I replaced the headphone jack assembly! As you can see below, this part was torn by the previous owner. Thanks for the hints.

Block Image

iPad 3/4 Wi-Fi Headphone Jack画像

製品

iPad 3/4 Wi-Fi Headphone Jack

$39.99

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Ok seems like you've done a lot, what is the most current status of the iPad after you've replaced all those parts? Also what parts are still not working? For the software issues, you should fix the hardware issues first then work on the software issues after.

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@toreskey Everything is fixed after I replaced the flex assemblies! As you can see below, this part was torn by the previous owner. Thanks for the hints.

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Very nice! Im glad you fixed it!

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@touretteskey Thanks, everything is as stated in the problem list, except the touch screen which is working allright now. I’m primarily not sure if I should be looking at the flex assemblies or the board (if that latter, I’ll ditch the thing).

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The headphone jack assembly would be a good repair to complete and definitely worth it, but get the part from here: https://www.fixez.com/store/ipad/ipad-4/...

it’s much cheaper and I use their parts all the time.

Also you had mentioned the black screen on first boot-up and not being able to long press apps to move or delete them. Now that I think of it, before anymore hardware repairs, I would plug it into iTunes and restore it to see if you can get the boot-up to work properly and get it to where you can manage applications.

If you manage to get those software issues fixed, you can repair whatever you want to get a fully working iPad.

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Chris Brandhorst さん、ありがとうございました!
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