My friend just got a Mac Book Pro recently, and it stopped working after a short while. This is what happened:
She placed the Mac Pro on a cooler, and after 3 days to a week the machine froze, displaying a pop up window that told her to restart.
After a while after she restarted, and it was working fine. However, when the same situation happened again she decided to let the laptop to go into sleep mode. When she closed the screen, the laptop didn't go to sleep; it literally just froze. I hope you can help me out!