Summary: I purchased this monitor in December and right away noticed a gradient that went from dark at the top to lighter at the bottom. I thought it might be an anomaly. I hooked it up to my laptop and the same thing. Sent it back for another and I had the same problem. Since then I noticed a similar anomaly on other monitors from different companies which I looked at a Office Max. So I don't know why this is. I ended up with a DELL UltaSharp and so far it's perfect.