IPhone 4S screen went black but it's still on?

About a week ago my iPhone 4S screen kept flashing on and off then went pitch black I think I spilt something on it but I have been soaking it in rice for almost a week now! I can still hear it when people call or text me so it's still on help!
Anyone know how I can fix this?!

Soaking it in rice for what? I'm guessing you dropped it in water. Soundz like the screen is stuffed. Youtube it and replace screen. I've done it, not that hard.