The health LEDs are driven by the BMC; the System Power LED is driven solely by hardware. BMC code determines the state of the Internal and External Health LEDs. The iLO 2 MP code, examining incoming events using its event dictionary, determines the state of the System Health LED.
External Health LED
The front panel External Health LED indicates the status of the components that are externally serviceable. It is used to monitor the power supply. Whenever the external health LED is lit, the corresponding FRU for the failed component also lights.
NOTE: Failures that cause the External Health LED to light do not cause the Internal Health LED to light. These two LEDs cover failures of different components.
Table
Table | External Health LED States | ||
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LED Color |
| Flash Rate | State |
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Off |
| Off | Health good on all external CRUs or system power is off. |
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Green |
| Steady | System power is on; externally serviceable components (accessible from front or |
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| back, such as fans and power supplies) are healthy. |
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Amber |
| 1 Hz | An externally accessible CRU failed. System is on or in standby mode. Usually, |
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| this is a power supply or fan failure. Check front/back LEDs for failed component. |
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This LED is cleared when all failed externally accessible entities are repaired and report that they are healthy, or when the system goes into ac/standby power cycle.
Table
Table
LED State | Description |
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Off | None. |
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Green | External parts, including fans and power supplies are healthy. |
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Flashing amber | A redundant, externally accessible CRU has failed. Check the front/back LEDs. |
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Internal Health LED
The front panel Internal Health LED indicates the status of the internal system chassis components. You must open the system to service these components. This LED maintains its state when the system is in standby mode (system power turned off but ac power still applied to the system).
The amber indicators on this LED correspond to internal health conditions that light other LEDs in the box, indicating which component must be serviced to correct the fault. For example, the Diagnostic LED board has a fault indicator lit when this LED shows amber. Failures that cause the Internal Health LED to light do not cause the External Health LED to light.
148 Troubleshooting