Hi everyone, i'm soooo desperate! this evening I was using the imac as always and the fans where going very fast. I decided to turn it off and on again. It never started again I'm using Lion on an imac 27 late 2009 First: this is what happened http://www.youtube.com/watch?v=lpiBgXQCJ4k a loading bar and then the imac turns automatically off. what I did: first I did a Reset of SMC. Now Everytime I turn on the mac the fans are really at maximum speed. Still nothing, after a while it turns off. Second step: tried the recovery hd. Pressing the option I entered the recovery hd from lion. I could check the permissions (but not repair the disk) and everything was ok. I tried to reinstall lion from there but the only disk it showed was the recovery disk itself (marked as protected) and nothing else. It could not see the main HD (even if from the disk utility I could see the main disk (but not repair it)) Third Step: I tried reset PRAM. Now we are in deep ****. Now the screen is BLACK. Is not turning on anymore. I press the botton, the fans starts, the "boing" play but the screen remains black. And after a while the mac turns off. I don't know what to do anymore. At least I would like to have access to the HD, before sending it to apple. I tought about formatting everything and reinstalling Lion but now that the screen in black every hope is gone... Any advice what to try? thanks!