MBP tech issues - problem is I dented the lid

I noticed my 2011 15" screen has uneven coloring. When I have dark screens, the coloring is blotchy, where the blacks are very uneven, and in light screens, I notice the edges (1" or so) are yellow (not extremely, but a visible tint). A frustrating, but not deal breaking, set of issue is I've had issues with videos freezing and getting the beachball during my casual usage. I can't minimize the screen or quit the program. I have to hit f3 to switch windows and then it corrects itself.

The bigger issue is the screen color. The only issue I'm having with simply calling and asking for a replacement is the fact that despite babying it, the computer got bumped and there is a small dent on the bottom of the lid. It isn't noticeable from every angle or huge, but it's there. Will this void Apple dealing with any screen related issues since it is on the same physical plane as the screen? I don't believe the screen issues are from the dent, as it isn't severe or in the affected areas, and there isn't any warping that would have bent the screen.