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Released September 20, Apple's largest and most expensive 2019 smartphone features a 6.5" OLED display, a triple-lens camera system, and greatly improved battery life. Successor to the iPhone XS Max.

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Boot loop flashing apple logo

I have a defect iPhone 11 Pro Max that didn´t show any signs of life. I could get it into DFU mode and also Recovery Mode with the screen detached. I bought a Replacement Screen and now it shows recovery mode on the screen. When I try to exit recovery mode i get stuck in a booting loop where the apple logo would flash and then it shuts down again. I was wondering if anyone had a similar issue? Restoring won´t work by the way (Errorcode 4013 in 3uTools). Can someone confirm this has to do with NAND ic? Or could it also be caused by faulty batterie or lightning port?

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Error 4013 can be caused by a lot of things but mainly the NAND. It is caused by a loss of USB connection. The first thing to do with a phone like this is to completely rule out parts. You can do this by installing the logic board into a known good housing with a known good battery.

Once you have confirmed it is not a parts issue you would move to the logic board.

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We have several external battery chargers and keep most iPhone batteries in stock. It is an easy matter for us to plug in a fully charged battery without having to do as much disassembly to check for the same thing

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Toby will be eternally grateful.
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