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Released November 4, 2017. Model A1865, A1901. Available as GSM or CDMA / 64 or 256 GB / Silver or Space Gray. (Pronounced the same as "iPhone 10.")

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iPhone X 4013 error does not enter dfu mode

Hey guys, got an iPhone X water damaged with 4013 error, ruled out common issues like the speaker flex and changed housing too. Same issue occurs. Phone doesn’t enter DFU mode, and gives me 4013 error on iTunes. I am suspecting a bad NAND Flash chip so i wanted to know how do I remove the nand? As I’ve never done a NAND fix on a Sandwich Layer Board. Do I seperate the two halves or straight away remove the chip? Because i’ve seen people where they do not seperate the board halves and remove the nand flash. Also if there could be any other issue someone can point me towards would be helpful.

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Also it was previously repaired by another tech and it was working fine, then suddenly the Taptic Engine stopped working so i suspected it was a bad charging dock so i tried a new one too, and new housing aswell, Same issue. User told me he was updating it and left it at that, when he came back it was bootlooping.

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Uploaded the iTunes Restore Logs here:

https://hastebin.com/ibuyokizad.yaml

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You don’t have to split the board but be aware the CPU is underneath and the NAND will require more heat for its removal.

If you have an iBox Mini you could test the NAND and reformat if necessary without removing it. I use it on the X after a bottom board swap to unbind the Wi-Fi from the NAND.

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I have the iRepair but the phone doesn't want to enter dfu mode, that is the issue?

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@iammyron07 So the error 4013 was in recovery mode? You might have more luck by forcing it into DFU. Inject 1v8 into the above test point to force it into DFU.

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Yes 4013 is in recovery mode

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@iammyron07 If it can go into recovery mode it can go into DFU mode.

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Error 4013 does typically point to a bad NAND if I’m not mistaken. Before you separate the layers, are you able to at least check the power and data lines that go to and from the NAND to make sure they aren’t shorted?

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Yes, I've checked all NAND power and data lines, none are shorted.

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Myron. will be eternally grateful.
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