On day 10 of the Surface Pro 3.. Two things I noticed today as I have been working in a darker room with lights out: 1) Screen is flickering slightly.. I have a dark background - definitely noticeable?? Never noticed before.. 2) Backlight on keyboard isn't coming on anymore? Not sure where I messed this setting up? Any ideas? Based on this I think I will return the device as I don't want to get stuck with a lemon!