Troubleshoot Hardware Faults
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Sun Server X4-4 Service Manual • October 2015
Single (Standby) Blink Rate
For the single blink rate, the indicator repeatedly flashes once at the beginning of a three second
interval. This indicates a component or system in standby mode. For example, the single blink
rate occurs when a server is in standby power mode or a when hot spare device is waiting to be
used (also used with amber indicators to indicate a predicted fault).
Slow Unison Blink Rate
For the slow unison blink rate, the indicators on the component blink in unison for half a second
during a one second interval (1 Hz). Typically, this is limited to three successive blinks. This
confirms the successful insertion of a removable device (for example, a storage drive or blade)
into a powered system (confirming the power connection).
Summary of Contents for Sun Server X4-4
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