I have an early 2011 15'' mbp running OSX 10.7.1 (problem occurred on 10.7.0 but not snow leopard when I had it, though i also replaced my RAM around this time) and I'm having a strange intermittent problem with the display not turning back on after I reopen the lid. I move the curser/ mouse or tap a keyboard key to wake the computer, and check that the display is not turned down but nothing happens, just a black screen. When this happens I am forced to hold down the power button for 10sec to reboot the machine. When the lid is closed the LED in the front blinks, like normal, then i'll open the lid and nothing appears. When i then close the lid after nothing happens the LED is solid which is strange. Nothing seems to work to turn on the display but from the sound of it the HDD is running when I do open the lid. The problem has happened a number of times but like i said its really intermittent. I could close and open the lid 50plus times and it wont happen then once in a while it will. Though as of late it seems to be more frequent, happened three time today! I've looked over some help forums and i am yet to find a thread about this specific problem, so any help would greatly be appreciated. Thanks!