iPhone repair, what can it be?

Question

iPhone

I restored the drowned man, when turned on, where is the network search or operator, I have an exclamation mark and there is no network
(! No network)
What is it and what is it eaten with?
The equipment is available, so the Chileans write “bring it to the service” in it they generally said it cannot be restored, but if you try, you can restore

Answer 1

Check whether there is an exchange with the base station and the signal strength from the antenna with a spectrum analyzer (if there is equipment). Most likely this is due to the "corrosion" of the power supply of the GSM chip, it is also likely that the antenna connections to the board are damaged. Restoring nickels under BGA is a thankless task and requires direct hands.

Answer 2

I generally managed to restore after the flood, because to say that it is impossible to restore is stupid, I even managed to restore after the flood, because it all depends on the service, so to speak, when I turned to this service https://ilounge.ua/catalog/remont-iphone the center of my iPhone became like new, I was just in shock, it began to work faster and better than before the "fill", because the guys are really talented, but at the same time they take it by God, not at half the cost of an iPhone, as many scare) Therefore, do not worry and do it wisely.