PulseBeat 0 Newbie Poster

sometimes when i view pictures or videos, the darker areas of the picture turn completely black and i cant see them. when i move the picture to the bottom of my screen it brightens back up and looks normal, and the same thing happens if i stand up and look down at my screen. It also gets darker if i move it up. I really hate it and was wondering if theres anything i can do about it?

the monitor is a Samsung SyncMaster 701N