Samsung Wave screen has gone black but I can still hear it functioning as normal?

My Samsung Wave screen is completely black but can still hear it functioning as normal when turned on and off, and when touch-screen buttons are pressed. I've tried recharging it, removing the battery, removing the sim card, but nothing has worked. Can anyone help?Samsung Wave screen has gone black but I can still hear it functioning as normal?Mine has done the same thing so I'm going to watch to see what happens. I too need the answer.