How to fix a black screen for iPhone 4S?

Recently, my iPhone received water damage, and even though the internal system still works and all its features, the screen has gone black. The touch sensors still works, Siri still works - I just can't see anything. Is there any way to fix this problem?

Due to the water damage it causes the screen to in a sense "break". The only way to fix this will be to get it checked out by an Apple employ. It could be anything from needing a new screen to needing a new phone.

(Most likely you will just need a new screen, if the other internal parts are working there shouldn't be much of a problem)