I reinstalled CentOS. Just used the default repositories. It just dies. The screen suddenly goes dark and I cannot do anything. Other virtual teminals are unreachable. The green light on my monitor turns yellow, indicating not signal. The only evidence of life is that I can usually reset it with the reset button. The power button is usually unnecessary.
I cannot try to remote in from another computer because I do not have another computer.
After a couple of the crashes, I've seen pages of orphan nodes in the / partition. Eventually I did yet another install using another / partition. Fewer orphan nodes.
I've looked in /var/{dmesg,Xorg.0.log,messages}, but did see anything that looked like a killer. That might be because I do not know what I am looking for.
Any suggestions on where else I should look or what I should be looking for?