回答“iPhone 5 wont turn on!”Firstly, make sure your iPhone is power enough, in a try condition. And then try to restart it. If all is to no avail, maybe you can force your iPhone 5 into Recovery mode to see whether it is fixed.
回答“iPhone 5s drop into water?”You should firstly put it into rice to try it then leave it alone for a few days to let it try completely. Maybe after several days, you can find it is OK as it was. Don't worry, though it becomes dead for good. Happy every day!