Xserve G5 hangs after attempting remote reboot

Question

I've had this problem for a while now, although it didn't exist when I first set up the Xserve. When I try to reboot the server, by logging in using apple remote desktop, and selecting "restart" from the apple menu, it appears to shut down, and then on restart, the Xserve's fans run full speed, stay that way, and the OS never starts up. It's a real problem especially if I'm off-site and I do, for example, a software update, and then reboot - because it means I have to drive in just to power it down and power it up again. This usually solves the problem - but sometimes not the first time. Sometimes I have to power down, power up, wait 5 min to find out it's still not started up, then power down again, then power up again, and then it usually boots fine.
here is what the system log shows:
ANY thoughts would be greatly appreciated. I tried calling Apple of course but they wanted $5,000 just to hear my question.
Nov 9 22:02:16 bubba shutdown: reboot by admin:
Nov 9 22:02:17 bubba SystemStarter[8119]: authentication service (8136) did not complete successfully
Nov 9 22:02:17 bubba SystemStarter[8119]: IP Failover (8144) did not complete successfully
Nov 9 22:02:18 bubba launchd: Server 0 in bootstrap 1103 uid 0: "/usr/sbin/serialnumberd"[211]: exited abnormally: Terminated
Nov 9 22:02:21 bubba ARDAgent [8325]: ******ARDAgent Launched******
Nov 9 22:02:23 bubba ARDAgent [8325]: ******ARDAgent Ready******
Nov 9 22:02:32 bubba SystemStarter[8119]: The following StartupItems failed to properly start:
Nov 9 22:02:32 bubba SystemStarter[8119]: /System/Library/StartupItems/AuthServer
Nov 9 22:02:32 bubba SystemStarter[8119]: - execution of Startup script failed

Answer 1

plg-
The last line or two are your clues. There is something located in your /System/Library/StartupItems/AuthServer folder that is causing you to crash when it executes a script.
Luck-
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