Hi,
I hope someone can help me isolate an extremely frustrating problem I have been experiencing with my u3014 display.
The display will occasionally start to show white flickering horizontal lines (almost like static - this video captures it well (thanks to the original poster) : http://www.youtube.com/watch?v=nrM59AM14A0&feature=youtu.be) and also exhibits an intermittent loss of signal necessitating a power cycle to restore. One also had an unresponsive OSD and power button.
I have now had two replacements fail in the same way, for a total of three displays exhibiting the same behaviour in less than a week.
Since I have a second display - an Asus - and this exhibits none of the same issues when connected to the same system in the same port on my EVGA GTX 680 FTW (two in SLI), I can only assume the fault is with the display, but having now had three with the same issue, I am forced to explore a deeper incompatibility or design problem.
I found another thread describing this exact issue, but having now had three displays all fail in less than a week, I am beginning to suspect a simple replacement will not resolve the issue.
Edit: I should add that I tried swapping DVI and power cables.