Oracle Sun Server X4-4, Service Manual

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Troubleshoot Hardware Faults
48 Sun Server X4-4 Service Manual • October 2015
Alternating (Invalid FRU) Blink Rate
A repeating sequence of lit green and amber indicators at 1 Hz. Indicates that a component has
an incorrect version or mismatch (for example, a power supply with a lower rating than the one
specified). Also used for an unsupported component, a component in an unsupported slot, or a
blade (server module) that causes a power supply to be oversubscribed for that system.
Feedback Flash
An indicator flashes on and off during periods of activity, commensurate with the activity,
but flashing does not exceed the 2 Hz fast blink rate (see, “Fast Blink Rate” on page 45 ).
For example, disk drive read and write activity and communication port transmit and receive
activity.
Data Blink Rate
An indicator that is normally on repeatedly turns off twice during a one-second interval (2 Hz—
see also, “Fast Blink Rate” on page 45 ) while data activity is taking place.
Sequential (Diagnostic) Blink Rate
A repeating sequence in which each indicator successively lights for 0.5 sec each to indicate
that diagnostics are running. This blink rate is used only on systems or components capable of
running diagnostics (for example, blade servers).