Chosen Solution

Hi! My iphone 4s was left outdoors while raining, and has lost power when I found it. After charging it works at beginning, only with problem with the Home button. However a few hours later the screen cannot be turned on. I open it up and found no sight of water inside. It can still be recognized and get its iOS restored by itune, however its screen remains completely black. I wonder where the problem could be and thanks in advance for your answer!

The problem seems to be the screen. I think you must get a new screen for it. Do you have any other 4s screens that you could test with? Ones with shattered glass etc. Or you could find a cheap display online.