Reading LED Indicators B-265
SP and SSP LEDs
Figure B-3 DC-Input Power Supply LEDs
In systems with a single DC-input power supply, and in systems with redundant power when both
power supplies are shutting down, the out fail LED goes on momentarily as the system ramps down,
but goes out when the power supply has completely shut down. In systems with redundant power
and one power supply still active, the out fail LED on the failed power supply will remain on
(powered by the active supply).
The AC-input and DC-input power supplies are self-monitoring. Each supply monitors its own
temperature and internal voltages. For a description of the power supply shutdown conditions and
threshold status levels, refer to the section “Environmental Monitoring and Reporting Functions” in
the chapter “Product Overview.”
SP and SSP LEDs
The SP and SSP have an enabled LED. The enabled LED goes on to indicate that the SP or SSP is
operational and powered up. All enabled LEDs (on the SP, SSP, and all interface processors) go on
when the boot sequence is complete. If the enabled LEDs do not come on, one of the following errors
is indicated:
• The SP or SSP is not installed correctly (not fully seated in the backplane connector).
• The microcode and software that are loading at startup are not compatible.
• The SP or SSP or interface processor has failed.
Note The SP and SSP have no LEDs other than the enabled LED to indicate that they are
operational.
OUT FAIL
INPUT POWER
H2498
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