I don't believe it's a power issue because the areas that go from bright to dim are always the same spots. For example, when I'm playing an FPS and I'm looking at a spot that goes dim, if I turn away from that spot it gets brighter but if I turn back to that spot its dim again. I'm not sure if I'm explaining it clearly but the problem seems to be that it goes from dark to dim or vice versa so suddenly between areas that it's kind of a strain on the eyes.
Also the only buttons I press are asdw when I play FPS or the numbers 1-0 when I'm playing an rpg.
Thank you again.