XPS 710 32 bit Vista Home Premium - Orange blinking light on, but no function - This occurs if attempting to power up without disconnecting the main supply for at least three/four hours after any previous use. When left for the time stated the machine kicks in and functions normally. This situation is applicable whether it has slept/hibenated or just plain shut down. Internal connections appear aok. Please does anyone have any pointers for this one. Thanks in anticipation - stuart