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Front operator panel LEDs

The front operator panel of the node provides controls, connectors, and LEDs.

Figure 1. Front operator panel buttons and LEDs
Front operator panel LEDs
Table 1. Front operator panel buttons and LEDs
1Power button with power status LED (green)3System Error LED (yellow)
2System ID LED (blue)4NMI button

1 Power button with power status LED (green)​

You can press the power button to power on the server when you finish setting up the server. You also can hold the power button for several seconds to power off the server if you cannot shut down the server from the operating system. The states of the power LED are as follows:

Status

Color

Description

Off

None

No power supply is properly installed, or the LED itself has failed.

Flashing rapidly (four times per second)

Green

The server is turned off and is not ready to be turned on. The power button is disabled. This will last approximately 5 to 10 seconds.

Flashing slowly (once per second)

Green

The server is turned off and is ready to be turned on. You can press the power button to turn on the server.

Lit

Green

The server is turned on.

2 System ID LED (blue)​

Use this system ID LED to visually locate the server. The LED can be changed to on, blinking, or off. You can use the Lenovo XClarity Controller or a remote management program to change the state of the system ID LED to assist in visually locating the server among other servers.

3 System Error LED (yellow)​

The system error LED helps you to determine if there are any system errors.

Status

Color

Description

Action

On

Yellow

An error has been detected on the server. Causes might include one or more of the following errors:

  • The temperature of the server reached the non-critical temperature threshold.

  • The voltage of the server reached the non-critical voltage threshold.

  • A fan has been detected to be running at low speed.

  • The power supply has a critical error.

  • The power supply is not connected to the power.

Check the Event log to determine the exact cause of the error.

Off

None

The server is off or the server is on and is working correctly.

None.

4 NMI button​

Press this button to force a non-maskable interrupt to the processor. A pen or the end of a straightened paper clip might be needed to press this button. This button can also be used to force a blue-screen memory dump (only when you are directed to do so by Lenovo Support).