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Rear view LEDs

The illustration in this section shows the LEDs on the rear of the server.

Figure 1. Rear view LEDs of the server
Rear view LEDs of the server

Table 1. LEDs on the rear of the server
CalloutCallout
1 System ID LED2 Ethernet link LED
3 Ethernet activity LED4 System error LED
5 Power input LED6 Power output LED
7 Power supply error LED 

1 System ID LED

The blue system ID LED helps you to visually locate the server. A system ID LED is also located on the front of the server. Each time you press the system ID button, the state of both the system ID LEDs changes. The LEDs can be changed to on, blinking, or off. You can also use the Lenovo XClarity Controller or a remote management program to change the state of the system ID LEDs to assist in visually locating the server among other servers.

2 3 Ethernet status LEDs

The XClarity Controller network connector has two status LEDs.

Ethernet status LEDColorStatusDescription
2 Ethernet link LEDGreenOnNetwork link is established.
NoneOffNetwork link is disconnected.
3 Ethernet activity LEDGreenBlinkingNetwork link is connected and active.
NoneOffThe server is disconnected from a LAN.

4 System error LED

The system error LED provides basic diagnostic functions for your server. If the system error LED is lit, one or more LEDs elsewhere in the server might also be lit to direct you to the source of the error. For more information, see Front I/O assembly.

5 Power input LED6 Power output LED7 Power supply error LED

Each hot-swap power supply has three status LEDs.

LEDDescription
5 Power input LED

  • Green: The power supply is connected to the ac power source.

  • Off: The power supply is disconnected from the ac power source or a power problem occurs.

6 Power output LED

  • Green: The server is on and the power supply is working normally.

  • Blinking green: The power supply is in zero-output mode (standby). When the server power load is low, one of the installed power supplies enters into the standby state while the other one delivers entire load. When the power load increases, the standby power supply will switch to active state to provide sufficient power to the server.

    To disable zero-output mode, start the Setup utility, go to System Settings > Power > Zero Output and select Disable. If you disable zero-output mode, both power supplies will be in the active state.

  • Off: The server is powered off, or the power supply is not working properly. If the server is powered on but the power output LED is off, replace the power supply.

7 Power supply error LED

  • Yellow: The power supply has failed. To resolve the issue, replace the power supply.

  • Off: The power supply is working normally.