Power-supply LEDs
This section describes the power-supply LEDs on the rear of the server and the suggested actions to correct the detected problems.
The following minimum configuration is required for the DC LED on the power supply to be lit:
- Power supply
- Power cord
The following minimum configuration is required for the server to start:
- One microprocessor in microprocessor socket 1
- One 2 GB DIMM (per microprocessor) on the system board
- One power supply
- Power cord
- Four cooling fans
The following illustrations show the locations of the power-supply LEDs for fixed and redundant models respectively.
Figure 1. Power-supply LEDs locations
The following table describes the problems that are indicated by various combinations of the power-supply LEDs and the power-on LED on the operator information panel and suggested actions to correct the detected problems.
| Power-supply LEDs | Description | Action | Notes | ||
|---|---|---|---|---|---|
| AC | DC | Error | |||
| On | On | Off | Normal operation | ||
| Off | Off | Off | No ac power to the server or a problem with the ac power source. |
| This is a normal condition when no ac power is present. |
| Off | Off | On | No ac power to the server or a problem with the ac power source and the power-supply had detected an internal problem. |
| This happens only when a second power supply is providing power to the server. |
| Off | On | Off | Faulty power-supply | Replace the power supply. | |
| Off | On | On | Faulty power-supply | Replace the power supply. | |
| On | Off | Off | Power-supply not fully seated, faulty system board, or faulty power-supply |
| Typically indicates a power-supply is not fully seated. |
| On | Off | On | Faulty power -supply | Replace the power supply. | |
| On | On | On | Power-supply is faulty | Replace the power supply. | |
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