If my laptop either goes into sleep mode, or if I close it then open it later, it freezes. It will come back from the black screen, but the mouse cursor is no where to be found. I have to manually restart the computer, which in turn makes strange grunting noises at me. It eventually starts the computer back up, but only after 5 minutes of a blank blue screen. Any help would be fantastic, the nearest apple store is 30 miles away. cheers.