Won't boot in normal and safe mode
I have an iMac 27" built in 2011. The iMac used to work fine, but now it won't boot anymore. When I try to boot it, it will show the apple logo and the spinning wheel, after which it turns to a blank white screen. It will stay on this white screen for ever. When attempt to boot it in safe mode it shows the apple logo and spinning wheel and the progress bar. Once the progress bar is about 50% it dissappears, after which the screen turns blue. Again, this screen will stay on forever.
I have already tried an SMC and PRAM reset, without results. Could somebody point me in the right direction?
Is this a good question?