Samsung galaxy s4 does not turn on, does not charge - 0 reactions

Hi DIY!

I got a samsung galaxy s4 problem is that it won't turn on.
At 99.99% the problem lies on the side of the motherboard ... It illuminated me 2-3 times after connecting to the computer but now it goes out as soon as I connect it, there is no reaction ... under the charger it also does not turn on or nothing.

I undressed it and looked at the whole motherboard under a microscope but all the elements are okay - you can't see anything being broken, etc.

I tried to turn it on even pressing the motherboard because maybe something did not connect, but also nothing (I recently had a similar case that did not connect one element on the board and did not want to read sim cards but never mind) ...

Holding my finger in one place, I felt that one of the elements is getting too warm .. But I can not feel exactly which is heating because they are too small ...
In the pictures I marked a suspicious place that heats up ...


I am asking you for help as I can accurately diagnose which element or elements are to blame for not turning on the phone.

greetings

Have you checked the battery voltage? Also check the charging voltage. In the attachment you have the service manual.

U800 probably fell, a common case in this model.