Hi, I've been looking all over google (mostly these forums) looking for what could be wrong with my mac. I started having this issue actually about a year after I bought my mac. It would just turn off without warning and I tried googling unexpected shutoffs of the mac, but nothing turned up. This would happen off and on, but not so much that I felt I needed to shell out for repair. One day though, about a year ago, it just wouldn't turn on. I opened it just to see if everything was alright in there, dust maybe? I touched the little black part by the fan and it was scalding. I then googled overheating macminis and nothing really would turn up other than doing PRAM resets, so I did that, and it came back to life. Off and on I would do this, along with power cycling, shooting compressed air in the vents, and hoping to God it would come back to life and it did. Now though, I can't get anything to work and it's been like this for three days now. This is my first mac and supposedly these things are supposed to be troopers, but my old HP lasted me longer than this thing. One thing though, now after the gray screen an apple logo pops up, a little bar appears under the apple logo and starts loading. I do think it downloaded a system update the day prior to this problem, so maybe it's related? I also remember one of the times it got this serious, I had just recently updated to Maverick- which is when I ran the PRAM reset. Thank you for your time!