hello, i also do have this kind of problem and yes, 1 year and a few month old mac, and RRFS said to check those links and it do not help too, sorry, RRPF, and I think it is not heating problem as the computer is cold like an ice and i am in New York winter, but may be dust, so how do i clean it out, and while i was typing, it goes black and when i press command+option+ eject, it turns back and 1 second later, it goes back black too, after 5 or 6 times like this, i redeced the brightness to the lowest and now it is working again, although i don't know when it will turn black again. I think it started 2 or 3 months ago, i am not sure it is related to update to Mac OS X Lion 10.7.5 (11G56) as it is the same time i was having the problem. so, please, please do something about this and it is more likely to be the software problem... believe me, when i was in my country using the windows, the room temperature is like 39 to 40 degree celcius and it was dusty like in a desert, and no heating problem.. I am not saying window is better, i like apple better in all ways, design, software, hardware, everything and looking forward to changing my lifestyle into all i-things... so, please don't make this tiny little problem to the people that don't want to look back apple again... the track pack thing? I love it ... please fix the problem..
I am sorry, if i were rude, i am not picking on you, RRPF, just presenting the problem.. if it does the dust problem, i want you to tell me exactly what to do without bringing it to the apple service ( if not necessary), taking this 30 lbs big product in the subway is not a very good idea... lol.