how to fix my pentax e50?

Hi I have a pentax optio e50. A few days ago it began takin pictures with lines across the screen. You can still see the picture but it just has horizontal lines across it. Some of the pictures being taken appear very bright white and you cant even see them. The screen is fine before the picture is taken, its only once its taken that this problem occurs. I was hoping there was a way to fix it without takin it in to be repaired.