My camera turns on and all the buttons work but the viewing screen is just a black screen. I can take pictures and it flashes but the pictures are just black. I have new batteries and the memoray card is correctly installed so I don't know what the problem is. The problem first started a couple of weeks ago where it would be black but if I played around with the buttons enough times it would work. Now no matter what I do all I can see is a black screen. Any ideas?!