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2016年9月16日发售。型号有A1661,A1784和A1785,支持GSM 和 CDMA 格式,存储容量有32GB、128GB以及256GB,颜色有玫瑰金、金色、银色、黑色、新的亮黑和红色。

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Unknown error (4000) when restoring iPhone

Just had a customer give me a phone which is in boot loop.

Plugged a new screen on, as the glass is broken, along with the home button and camera installed. but still the same.

So tried to restore, but get “unknown error occured (4000)”

whats the cause of this?

Thanks

Answer this question I have this problem too

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Android 维修工具包

一个新的屏幕或电池就在一个套件之内。

现在开始购物

Android 维修工具包

一个新的屏幕或电池就在一个套件之内。

现在开始购物

2 Answers

Most Helpful Answer

try restoring without the home button and camera connected to see if you get the same error

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In the end, I restored it with another camera.

After the restore, put the original camera back in and it started up fine.

Either unlucky the first few times, or a coincidence with the camera swap.

Either way, it's now up and running.

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Here’s a fix I found from Apple Support: https://support.apple.com/en-us/HT201263

Follow the steps provided in this support article, but remember to back up your phone before you begin: How to back up your iPhone, iPad, and iPod touch

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Cant back the phone up if it’s in bootloop, and already tried DFU mode

Thanks

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Sorry that didn't work for you! I'm at a loss. Good luck!

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Duane will be eternally grateful.
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