Michael Klinosky wrote:
What could be wrong? What else should I check? How do I fix it?
Sounds like a kernel panic of some kind, either hook up a serial console to the system and watch the console from another machine or switch back to a normal terminal (CTRL+ALT+<F1>) and plug it in and see what you get.
Serial console is best as you can easily copy/paste the crash output.
You could also try kdump - http://kbase.redhat.com/faq/docs/DOC-6039
nate