Since the 10.6.3 update, Randomly, and out of no where, my displays will simply go black. As if they are asleep. But I can't wake them up. This Mac Pro is the server for my office and it still acts like the server and I can access it's files through the finder on my laptop. I just can't get the displays to wake up. They are two 20" cinema displays, about three years old.
So, I'm adding to the list of problems as I've tried to trouble shoot this.
The displays work fine. I've confirmed that by plugging them into other computers.
Whereas before, when I restarted the computer, I would get my displays back, now when I attempt to restart, I see the gray start up screen briefly, I see the apple sign, but no gear symbol spinning, and then the screen goes black.
I have tried this with two displays attached, one display, and connected to all four display ports on the tower. All with the same result. A brief gray screen at start up and the screen goes black just after the apple shows up.
The computer appears to continue to run. I have no idea if it boots up all the way since I can't see what is happening.
If I wait long enough, I can get into the files of the computer on the local area network through the finder.
However, the name of the computer has been changing with each successive start up. It was mac pro, now I see mac pro (2), mac pro (3), mac pro (4), and now mac pro (5). So there appears to be a network, ip address sort of an issue?
I have to select the most recent renaming in order to connect and get into the computers files.
I cannot do a screen share as I was once able to. Early on, I tried this first to see if I could "wake up" the displays, but all I saw during the screen share was black screens.
I cannot see the computer from home when I normally could through mobile me.
I have tried to reset the pram, no help there. I have tried to start up off of another disk holding down the option key, no luck. the same thing always happens, I get a gray screen, the apple comes on, and poof, the screen goes black, but the computer seems to be running.
