11in fully upgraded early 2013 machine -- same problem. Screen goes snow, black, snow, flickers sometimes to black. At times I have to sit and wait, sometimes minutes where I give up, unplug "thunderbolt" and work on the 11in screen.
I purchased this machine to be able to work remotley and setup a desk station at home. This defect is more than a nusance. I will not be purchasing another Mac in the future. As for this one -- converting it to Linux Ubuntu as we speak. (and as the screen continues to flicker black!).
I purchased 13" Mac Air for my wife thinking it might be time to switch all machines (desktop and 11" for my travels) to Macs. I was within days of purchasing a 27" desktop as well as another Mac Air for myself when her's crashed-totally disabled. It seems that Apple has had these hardware issues for a while and have not resolved the issues. Even though I have owned 2 Microns and 3 Dell computers without issue, I realize that sometimes "stuff happens" and can overlook issues if they are resolved in a timely manner. The Apple support has been terrible! At the national level, they say it is a local store issue; the local store says there is nothing they can do except order new hardware, which they have done. Parts should arrive within a month-maybe. In the mean time, no computer. PC's may not be so glitzy-but, they work. That was close.
Wondering if anyone is still experiencing this problem? I am kind of wondering if this is a incompatibility between the video technology in the MBA and the technology in order displays. I am seeing is in some cases where I need to hook up to a computer projector, but not seeing this when connecting to large flat panel conference room displays.