Server unresponsive

We have an SBS server that periodically hangs, becomes completely unresponsive at the console and on the network.   It is running Windows SBS server, Blackberry server, timberline, exchange....I have contacted Dell and all firmware, drivers, bios are up to date.  There are no events in the log other than the time the server shutdown.   No application errors, no system errors.   I need some assistance in getting to the root cause of the system going unresponsive.

Any help is appreciated.

egrotjahnAsked:
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bobohostCommented:
Is the server freezing during off hours or during the day?  If you stress the server will it freeze?  Any errors or pop-ups come up when you reboot the server?  

Have you looked at your hardware?  I had an issue a while back and swapped out the memory and it worked fine after.
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winstein2005Commented:
If all the software are up-to-date, it could be a hardware issue.  Try to find a pattern from the log.  If it always happens at night, or at certain time of the day.

Besides memory, it could be power supply is going...  Or it could be a bad network card.

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Asif BacchusI.T. ConsultantCommented:
If you've ruled out software issues then you're likely looking at hardware.  Start simple, run chkdsk to verify you don't have any bad sectors on the HDD.  Next, try switching out the NIC if you have a spare.  Finally, if you can work without your server for a night, consider running a utility such as MemTest86 to check the RAM overnight.  MemTest86 runs from a floppy or a CD so your server won't be available while its running.
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egrotjahnAuthor Commented:
Turned out to be a firmware issue with the disk and raid controller.   Thanks for the help.
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