Hello, I'm having troubles with my 2011 iMac. When I press the power button, I see the loading bar but then the screen shuts down at around 40% of the process bar. I've tried to turn it on with several keyboard combinations, but nothing seems to work. I've had this problem earlier and them I had to buy a new internal hard drive, so I really hope there's a solution.. Also I don't have a backup (stupid i know...) but I don't really have any important files so I don't mind if all my files are gone. I just really want a solution because I've been busy all day to try to get it to work.. Pleaaassseee someone help me out!