happened twice on me, my new macbook pro wont wake up. first time, not sure what i accidentally pressed and the screen went off. tried to "click" and then press the power button, screen wouldnt turn on. strangely though, didnt think the computer really "slept" because when i "clicked" or pressed the power button, i could still see through the dark screen my computer was still running, i could still that "downloading updates" and a couple other windows on at that time. 2nd time, left my computer on as i was installing softwares, was fine when i clicked to wake it up, but then when it went to sleep again, it wouldnt wake up. had to force-shutdown with the power button to re-start up. advice.