This morning our IBM server rebooted itself. After the reboot I logged in but before I could check any logs/event viewer it shut itself off. Now all it does is constantly reboot itself. The fan that goes loud when you first reboot (and would quiet down after a few seconds) stays loud. My assumption is that it is the power supply. When I first unplugged it and let it rest for 5 minutes, then plug it back in, I did get a full boot up. But again the fan stayed loud so I tried a windows reboot to see if I could get the fan to quiet down. That was a mistake because again now all it does is reboot itself. Does anyone else have any ideas? I'm sure I have not given enough information so please let me know what information you might need to help. I have an IBM service guy on his way but have no specific time when they'll be here so wanted to see if I could solve it in the meantime.