Sun Microsystems Sun Fire V440 Diagnostics And Troubleshooting Manual page 148

4. Check the system LEDs.
5. Check the /var/adm/messages file.
The following are clear indications of a failing part:
Warning messages from Solaris software about any hardware or software
components
ALOM environmental messages about a failing part, including a fan or power
supply
If there is no clear indication of a failing part, investigate the installed applications,
the network, or the disk configuration.
What Next
If you have clear indications that a part has failed or is failing, replace that part as
soon as possible.
If the problem is a confirmed environmental failure, replace the fan or power supply
as soon as possible.
A system with a redundant configuration might still operate in a degraded state, but
the stability and performance of the system will be affected. Since the system is still
operational, attempt to isolate the fault using several methods and tools to ensure
that the part you suspect as faulty really is causing the problems you are
experiencing. See:
"About Isolating Faults in the System" on page 32
For information about installing and replacing field-replaceable parts, see:
Sun Fire V440 Server Parts Installation and Removal Guide
130 Sun Fire V440 Server Diagnostics and Troubleshooting Guide • July 2003