When the pcu is trying to reboot after an automatic update it goes to windows xp and tries to load. Then it shows a message "no signal analog" This happened in the middle of the night and this pcu is the one that is my server. I can get on the inter on another machine on the wireless just cannot get on this machine

What's a PCU? I assumed it was a typo until you did it again. And you actually have a server that's not running headless? Are you sure its even powered up? The monitor displays that when it doesn't see ANY signal from the computer... usually when the computer is turned off.