RedHat Server hangs... how to troubleshoot.

[unix syzadmin]

Hi,

We have installed "Red Hat Enterprise Linux ES release 4 (Nahant Update 2)"
on HP rx4640.
The server hangs every day.  The server does not respond to telnet and I
don't get the diplay at the console.

Request you to suggest me on how to root cause the issue.

Thanks & Regards,
-GnanaShekar-