Hey all, My Mac Pro had been sitting idle for about 2 weeks while I was traveling on business. It was working since I was able to Back to My Mac it while I was away. When I got back I turned my monitor on rebooted to install some recent updates. Once that was done, after about 30 seconds the screen started going black for 10 seconds or so, then coming back. My monitor never lost signal, the video just went black. After doing this for about a minute (10 seconds black, on for about 10 seconds, etc.) a brief splash of digital noise (like the old white noise on an old TV) appeared in between the black/non-black splashes. I hit the power button and put the machine to sleep, woke it back up, and it hasn't come back since. Should I worry about this? Has this happened to anybody before?