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

5. Check the Ethernet port LEDs.
Two Ethernet port LEDs are located on the system back panel.
LED Name
(color)
Link/Activity
(green)
Speed
(amber)
What Next
If LEDs do not disclose the source of a suspected problem, try putting the affected
server in Diagnostics mode. See:
"How to Put the System in Diagnostics Mode" on page 57
You can also run power-on self-test (POST) diagnostics. See:
"How to Isolate Faults Using POST Diagnostics" on page 65
How to Isolate Faults Using POST
Diagnostics
This section explains how to run power-on self-test (POST) diagnostics to isolate
faults in a Sun Fire V440 server. For background information about POST
diagnostics and the boot process, see Chapter 2.
Before You Begin
Log in to the system console and access the ok prompt. For instructions, see:
"How to Get to the ok Prompt" on page 176
Indicates
If lit, a link is established. If
blinking, there is activity. Both
states indicate normal
operation.
If lit, a Gigabit Ethernet
connection is established. If
off, a 10/100-Mbps Ethernet
connection is established.
Action
If this LED is off and you
know a link is being
attempted, check the Ethernet
cables.
Chapter 3 Isolating Failed Parts 65