stalled boot up process

[daisy]

  My Red Hat linux system stalled one day and wouldn't allow any keyboard input.  We only use this machine as a web server and no one was using the machine at the time.  
   
  We tried to reboot the machine but couldn't.  The boot up process just stops   The first time it stops at the following line,
   
     INIT: version 2.78 booting
   
   
  At the second and third attempt to boot, the set up process stopped at 
   
     Setting hostname  www.mycomputer.com
   
   
  The last time it stopped at the following (Pressing Y did not do anything.  Boot up is still stalled.)
   
     Initializing USB Controller (usb-uhci)
   Your system appears to have shut down uncleanly
   Press Y within X seconds to force file system integrity check.
   
   
  As shown the boot up process stops at different points.  Does anybody have any idea what the problem could be?  Hardward?  Software? I am sorry but I have no idea how to proceed, and would be grateful for any help.
   


 
---------------------------------
Sucker-punch spam with award-winning protection.
 Try the free Yahoo! Mail Beta.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/redhat-install-list/attachments/20070219/6151ccf5/attachment.htm>