Hi, I recently bought my first mac (MBP 13" Late 2011) directly from amazon and I just got it today. I noticed that the screen has kind of a yellow-tint to it and the blacks of the display are really black.. like there's too much contrast. Is this normal? Will this go away? I contacted amazon online and the person said I didn't receive any defective item and they will refund me $17 back because of the issue... What should I do?