have tried quick press & hold down but the light on the on/of button just keeps blinking. – Mon JoseDec 6 '11 at 14:31
So are you saying it won't even turn off? It just stays in the sleep mode? – JayDec 6 '11 at 14:53
You could try powering off completely, by holding the off key down for a period of time (although you might lose unsaved work). I have read of similar problems, but nothing definite. Have you updated the video driver? One solution I have read is to download the asus auto updater in order to update the bios. – w3dDec 6 '11 at 14:58