Original post by: Allan Barr ,
If it's water damaged it could be anything. Once it gets wet and has voltage running through it, it will start to corrode on the connections immediately. You will have to take the phone apart and clean it up and find any shorts and probably a new screen and you will most likely still have issues with the phone. Most repair shops won't work on phones that are water damaged except to extract data because of all of the problems and all of the future problems.