原帖由： Tony Wood ,
I have the 2011 iMac 27 inch and in the past few months the black screen problem has started. I have a second monitor attached and can see that the system is still operating normally, except for the black screen of course. Hitting the “control shift eject” sequence works as does hitting the sleep tab on the drop down menu on the Apple symbol. To simply bring the main screen back on hitting any key on the keyboard seems to work, especially hitting the “eject” button. So to me, clearly this is not a graphics hardware related issue, or an over heating one either. I believe this is an operating system issue, one which I believe Apple could easily identify and fix if they had the best intentions of their loyal customers at heart. Maybe the want people to get so frustrated with the problem that they will go out and buy a new systems, or am I being cynical!!! It would be interesting to go back to previous versions of the operating systems to see if at any point an update caused the problem to start but I don’t have the time or inclination to try this out.