First thing we need to know, is does this happen if you just start the computer and then let it sit. You don't do anything with it, it just sits there. And you aren't, by chance, getting a box in the middle of the screen with a message about needing to reboot the computer in a couple of different languages?
I start my computer and the desktop appears. Then a few minutes later the screen goes black. I hit several keys to wake up the computer and nothing works. I need to restart the computer with the start up button and the screen keeps going black after a few minutes of operation
I have a I-Mac with system 10.6.4
I reinstalled the system with Leopard Snow
I put the screen saver to never and still the same way
I use photoshop and the resolutions is very high but this just started and photoshop has been in a while
I don't know what to do anymore for this problem