iPhone goes to DFU mode after screen turns off

iphone goes to DFU mode after screen turns off .

it's ios 15.6.1 and can't update because if I try to update it goes to DFU mode.

Also I tried DFU flash but it fails at nand flash and itunes make error 9.

It doesn't go to DFU mode if I don't turn screen off

how can I fix it?

Ответ на этот вопрос У меня та же проблема

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Is it connected to iTunes when the screen goes off to say it's in dfu mode? Try a restore but with a different cable and computer if possible.

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