stick46 @ 23.02.20, 18:59
There are iPhone 5S (no ref, not drowned, I have it for a long time) on iOS 12.4.4. Once he left alone in the DFU, then, while trying to reset it, moved on to the screen with drawstring. In any does not want to be reset or updated - all the time beats error 9. Tried different computers (on macOS and the Windows), different Lightning (original and not) - the result of one.
You have 100% blade Nand or (most likely), or processor that It affirms:
stick46 @ 23.02.20, 18:59
I reset and restore the firmware using the freezer. While set up the phone, he went out again into DFU
It explained simply. After the solder balls of the freezer at one of the chips have decreased in size, respectively, there was contact, and you flashed the device. After that, the balls again increased in size, the contact was lost, the body ceases to see the memory and fell into SPU. Rebollo is solved, bring into service