OSX server shuts down after start up

spoolin spec v

I have OSX server OS and Everytime I start it up, It will just go to a black screen after 5-10min of working perfectly fine.

My comp. has worked perfectly, Then I installed some updates, Itunes i think? And the comp. Shuts down, and when it restarts it works for 5-10 min, perfectly fine, then freezes, and i get the beach ball, that just spins around for a min or so, then the screen just goes black. the comp. and monitor stay on, but its just black.

If i just hold the power button, to turn it off, and instantly re start it, the grey screen with the apple and the loading spinning deal comes up,the loading thing that spins will become pixulated, and just stay on that screen till i turn it off.

now if i turn it off, let it sit for a few min, it will start up, then just go black after 5-10min.

Any help?
Thanks alot
Kurt Kennedy

What's showing in Console around hte time it goes black?

On which Mac or Xserve do you have your OS X Server installed?
How are the energy and screensaver etc settingss? (could have changed to turn off the display in 5 or 10 minutes in these settings..?)