Hi Everyone, I'm having some issues with my month old Mac Pro, that I purchased from its Original owner. Here are the issues: First issue that I cannot figure out, is that the Displays will go to sleep, then wake up almost immediately on their own. Its a repetitive cycle. It happens throughout the day & night. Example: If I physically turn the displays off, then the issue is moot, but if I let them fall asleep on their own, then the cycle begins, over & over again. I used the search function, but nothing turned up, that resembled the issue I am having. I would prefer to avoid taking it to an Apple Repair Center, unless it is something that I cannot rectify on my own. The second issue, is this morning (27 Aug. 2010) when I went to use my programs that I leave up overnight (in this case, they were Firefox & Photoshop). I could access them, but nothing else (FF, would not refresh pages, PS I could not use any tools or access the History on open files). I was able to close FF via Command Q, but I could not close PS, as I could not access the Do Not Save buttons, when the close dialogue came up. So I shut the tower down via the button on the front panel. When I started the tower back up, the tower booted (ram lights all came on), and then there was this constant clicking noise emitting from within the tower. I opened the case up, listening for the noise and it was coming from the bottom, but not the HDD bays.. Once the login screen came up, I could not log into my acct. So I pressed the power button again, and then let the tower sit for a moment, and restarted it. This time, the clicking noise was there, but it was very brief & almost inaudible, and then I was able to log into my acct, and the home screen loaded. Since then the tower has been up & running as normal, but the screens won't go to sleep. (I have the sleep feature enabled @ 3 minutes). Any and all input would be greatly appreciated.