Hi all. I tried searching all over the web for info on this, but can't find it. It all started a few days ago. I turned my macbook pro on, and the grey screen came on, then quickly went black. the light in front indicated the macbook pro was asleep, but it refused to wake up. No button pressing worked. I'd turn it off and on and it would do the same. Eventually, on its own, it turned on, VERY slowly. So I restarted when it was finally done booting, and it was fine. Then today, mid movie (I street from iTunes to Apple TV), it went to sleep. So I push buttons and nothing. I turn off and on, and I get the same issue, grey screen briefly, then sleep. Eventually it turned itself on, slowly, but a lot faster than last time. Any idea what this is/how to fix it? I made an appt. with the Genius Bar, but it's a week away, and I would ilk my computer to work if possible. Thanks all. FYI I have a 2.3 GHz Intel Core i5, 4 GB 1333 MHz DDR3, OS X Lion 10.7.3.