Motherboard problem, cant restore- 4005 error

I have this iPhone 7 after little fall it cant start. With good LCD just never see a single light.

In DFU mode iTunes can recognize it, but wont show Flash size in GB (flash chip fail?). I extract software and motherboard gets pretty hot. Then it should restart and install- but it will keep waiting for the iPhone forever showing error 4005 in the end. Still no sign on LCD.

When I want to measure current, when I start the Iphone, it takes in an infinite loop this scheme: 1 sec from 0,4 to 0,6mA and 0,5 sec suddenly 0mA.

Any ideas?

I think maybe HDD chip is wrong but will imei box be able to read it and put data to new one?

Answer this question I have this problem too

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