Why is the LCD screen not working?

Why is the LCD screen not working?

When I turned the camera on, the screen appeared black. I could tell the camera was working and taking pictures because I could hear the shutter sound and it could still zoom in and out. I've tried turning the camera on and off multiple times, but it still will not turn on. My daughter's 1st birthday is coming up and I really need the camera to take pictures. Please help.