If it was switched on, when you dropped it in, and now does not switch on, probably too late, you have probably caused irreparable damage by trying to switch it on, some times after dropping anything like that into water, never try switching it on, open it up asmuch as possible, in your case it would then have needed to be washed out, to get rid of any bleach, then you let it dry out for days at least, in warm place. Not the water that causes the problem, it is trying to use before it is dry.
SD, January 2013