Every time I log into my Mini, the screen is black except for where there is activity (mouse, scrolling iTunes info window, temp, etc). This started happening about six months after I got my Mid 2011 2.3Ghz i5/HD3000 Mac Mini, (about 2.5 years ago or so). It's used as headless media server and nothing else seems wrong, but it's still driving me nuts every time I log in. Temps are normal, nothing over 120-130. I've taken a screenshot. I have never had this happen to any of my Macs over the years, and system upgrades don't seem to help at all. Do I need to pull it apart and reseat the heat sink, or has anyone else heard of this?