Flash iOS in DFU mode stop at random NONCE

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iPhone 6

这款4.7英寸iPhone于2014年9月19日发布，是iPhone 6 Plus的缩小版。

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Andre @andre8

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发帖于: 2018年2月17日

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Flash iOS in DFU mode stop at random NONCE

iPhone 6 have problem with totally dead screen and the only thing showing that something is alive is that I can get it in DFU mode. I don’t get the serial number or other information about the phone and when I try to flash it after loading iBSS it fails at “reading random NONCE”.

Obviously the power and home button work, after measuring I also know that it’s charging. I got the phone from a friend and what I know the screen has been replaced by professional and after that the phone worked for a few months before this it just died one day.

Any idea where to start, NAND maybe?

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Ben @benjamen50 声誉积分: 159.7千 Mtwo Perform 11 191 368 · Answer 1 · 2018-02-17T23:15:16-07:00

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Ben @benjamen50

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Mtwo Perform

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发帖于: 2018年2月17日

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Looks like NAND, are you getting iTunes restore error 4013?

Could be CPU not getting voltage, shorted, NAND chip need replacement / reprogramming.

Usually it's NAND in this case.

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I got error 4005 in iTunes. Take away and reball or can it be an idea to put something under that puch it against the motherboard.

由 Andre 完成的 2018年2月18日

It's a board level issue:

http://forum.gsmhosting.com/vbb/f631/iph...

Looks like reprogramming the NAND and reballing it to put it back on needs to be done.

Reballing NAND could work without reprogramming the NAND but that sometimes isn't enough.

由 Ben 完成的 2018年2月18日

Ok, I don’t have tools to reprogram it. Maybe not the soldering skills either but since it not working as it is I don’t lose anything to try. Just heat it up is no idea to try.

由 Andre 完成的 2018年2月18日

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