I just got a new presario with vista on it. Have been "sleeping" it when not in use....thought it was working. Hit sleep button and screen shuts down to Power Save Mode (I then turn off monitor)... power button on tower goes yellow.....so I assume it is asleep. BUT if I come back in a few minutes, the power button is green again and when I turn on the monitor the screen is activated. Is this right...or should the power button stay yellow? All info on the pc says you have to hit the power button again to 'turn it back on' but I only need to move the mouse. Any ideas? thanks from a new Vista user.