Right i've never owned a mac laptop before and am just getting use to not having a mouse. no kidding. right when am doing something and i close the screen. to move or something. the little white light comes on the front and stays on untill i open the lid. but the screen or computer doesn't come back on and i have to hold the power button down for 10 seconds and try and switch it on. to which it boots like fully. as if it had shut down and come back on. what am i doing wrong or should this not happen??