I have a Mini that I use as an HTPC, I haven't used it in about a year but it was stored in a climate controlled environment. What has been happening is when I try to wake it up from mouse or keyboard input it doesn't do anything. In fact, I don't even have it set to sleep in the system preferences, so it should be on all the time, but it is set to turn off the screen after 3 hours. I was able to use 'Screen Sharing" to access it, so I went to the system preferences to change the resolution, thinking that that would force it to refresh the screen. Unfortunately all that did was lock the system up. I can move the mouse around, but can't click on anything. Any ideas as to why this happens (this isn't an isolated event) or what I can do to fix it?