On some if not most occasions, my mac book pro wont exit from sleep mode after i close the lid. Time has no change where it happens both right after i close the lid or if its been closed over night. It also happens both being plugged in and not plugged in. I have came to my own conclusion that temperature has something to do with it because when it is more warm it doesnt happen as much, but this is my educated guess with no real knowledge about computers. I am just trying to get some feedback with a topic i have no real knowledge of and would rather not take it in to apple and pay too much money for it to get fixed.