From time to time my display will go off even though the computer is still running correctly. To get the display on again I simply pull out the plug and reinsert it. I have replaced the power strip but the problem persists. The display is connected to a PC with a Nvidia GTX 470 video card just puchased. The computer itself was puchased in July 2007 from Falcon Northwest (Model Mach V). I have been using the Cinema display since the PC was puchased but this problem is only about one year old. The issue ocurred with the video card that came with the computer and this year became defective. I thought the problem might be with the cinema display transformer but have not yet replaced it. Can someone help me with this problem, would be greatly appreciated.