I just bought the camera 2/3 months ago and it was working fine. Then after using it at my graduation on saturday, I tried to review pictures and the camera would not turn on. it just makes the sound as though its going to turn on and the screen flashes, but the lens won't open. I've tried everything from changing out the battery for a new one and tapping lightly. I don't know what more to do- it hasn't been dropped or wet or anything else that could affect the camera. Please help! I dumbly did not buy the warranty!