To be honest I have very little hope for a good outcome, but I have some issues with the U2715H.
You (Dell) claim it to be for professionals. But the light/color uniformity is horrible. I've had 3 of these monitors (I want 2, but I ordered 3 so I could send the worst back). And all of them had the same bad uniformity of light/color. Especially noticable with white background. And even more with gray.
All these 3 copies had the same issue. Everybody on the internet who reviews it has the same complaints. Even tftcentral.com has it's doubt's about the screen quality and does not recommend it (if only I read that sooner..)
So how come Dell thinks the uniformity is good enough if litterly in every review there are complaints about this? Im thinking about sending them all back and go for an iiyama or maybe EIZO
Anybody else, maybe some DIY fixing?