I have an issue with my OES2 server (64bit) (Proliant DL380G5 dual quad
core Xeons, 4GB ram).
It happened twice that the server completely locked up, not pingable and
only a cursur on the screen and unable to type anything on the console.
The only solution is to turn it of and on again.

There is nothing in /var/log/messages nor in cpqimlview.

What is the best option to troubleshoot this issue (null modem maybe?)