Computer Hangs or Freezes on Shut Down or Restart

I have a B&W running OSX Server 10.3.9 and for some reason it will not shut down. It logs out and goes to the Blue Screen with the spinning logo thing but nothing happens. The Computer just sits there and doesn't shut down.
I checked the Ram, The Battery, The Hard Drives and everything seems ok. What should I be looking for???
Any help would be great.

I'll take a stab at it. When I had duplicate fonts on my computer, very strange things happened...
1. Start the application "FontBook" and see if you have any duplicate fonts (bulleted ones). If so do an Edit>Resolve Duplicates for each one.
If you found resolved duplicates, do a restart.
2. Check FontBook again. Are the fonts still resolved? If so, and the computer is running ok, you're done (hopefully). If the fonts are duplicated again, go to User>Library>Preferences and trash the com.apple.FontBook.plist file.
3. Reaccomplish item "1" above and restart.
Hope this helps,
Bob

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