How To Isolate Faults Using Leds - Sun Microsystems Sun Fire V440 Diagnostics And Troubleshooting Manual

3. Set OpenBoot configuration variables to trigger diagnostic tests. Type:
ok setenv post-trigger all-resets
ok setenv obdiag-trigger all-resets
4. Set the maximum POST diagnostic test level. Type:
ok setenv diag-level max
This ensures the most thorough testing possible. The maximum testing level requires
considerably longer to complete than the minimum. Depending on system
configuration, you may need to wait an additional 10 to 20 minutes for the server to
boot.

How to Isolate Faults Using LEDs

While not a comprehensive diagnostic tool, LEDs located on the chassis and on
selected system components can serve as front-line indicators of a limited set of
hardware failures.
Before You Begin
You can view LED status by direct inspection of the system's front and back panels.
You can also view the status of certain LEDs from the ALOM system controller
command-line interface.
Note – Most LEDs available on the front panel are also duplicated on the back
panel.
You can also view LED status remotely using Sun Management Center software, if
you set up this tool ahead of time. For details on setting up Sun Management Center
software, see:
Sun Management Center Software User's Guide
62 Sun Fire V440 Server Diagnostics and Troubleshooting Guide • July 2003