I have an imac that is almost a year and a half and this morning when i went to wake up it wouldn't wake up. So i thought that maybe my other half turned it off so I tried the power button and nothing happened. I continued pressing the button than it made the moise like it was starting to turn on and the screen was grey than all the sudden went black. I let it sit and the fan turned on but the computer screen stayed black. What could be wrong with my baby?