I've had this for about 18 months now and every 5 minutes the monitor goes black and the LED light at the base turns off. The power and display are restored after about 5 minutes however it is a constant problem. I have tried different power cords and both DVI and VGA ports on the Graphics card but neither of these fixed it. I am running Windows 7 64bit with the latest version of my display driver installed.

Any help is appreciated

Sam