What should I do if my iphone 1 1 falls into the water and is fished out?

I'm an Apple maintenance engineer. Let me talk about it.

If iphone 1 1 is flooded:

1. If there is water, don't try to turn on the machine immediately. Because the iphone has a built-in battery, it can't be disassembled, the motherboard will be short-circuited when it enters water, and it will burn the motherboard when it is opened, causing irreparable consequences.

2. You can dry the water outside the mobile phone with toilet paper first, then put the screen of the mobile phone horizontally to prevent the water from flowing to the motherboard, and then blow the water dry with a hair dryer to open the air at medium and low temperature.

3. Wipe the circuit board and other places with anhydrous alcohol, and then try to turn it on. Because alcohol evaporates quickly, the water on the circuit board can evaporate together.

4. If the water is always hot and the black screen is not turned on, the motherboard is mostly short-circuited.

5. Pay special attention to mainboard maintenance. Don't replace the whole motherboard as soon as you hear that it is broken.

The motherboard is not a whole, and there are many small chip structures, including baseband, cpu, hard disk, wifi module, touch screen ic and so on.

Many local experts don't know how to repair the chip. It is very expensive to replace the whole motherboard.

In fact, just change the chip, which can save more than half.

The yellow chip in the picture below is the most common power ic. If it burns, it will open a black screen, just change it.

I've been repairing mobile phone chips and I know all about them.