I don't know what happened but when I left my place yesterday the emac was running and when I came home it was off (no power failure happened--everything else was fine). I cannot get it turned back on (button will not work). I need to know what to do?? This computer has everything from the last three years AND everything from my old iMac and old ibook. I just want everything off the hard drive immediately and backed up. I had dreams last night that I lost all my photos, music, and school papers. This a nightmare to me.