how to fix a white screen only while taking pictures on cell phone?

Have a Samsung cell phone and every time I try to take a picture there is a white screen where I can't see the picture I am taking. The rest of the phone is viewable. I don't know if I pushed the wrong button or what. What option would cause a screen to be white and not allow you to see the picture. If I try to take a picture in this mode the picture is sid white.