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Front LEDs

This topic provides information about the buttons and LEDs at front of the server.

Figure 1. Front LEDs

Table 1. Front LEDs
LEDs visible from
Security bezelServer front view
1 Power status LED (green)5 Power button with power status LED (green)
2 Network activity LED (green)6 Security LED (green)
3 System ID LED (blue)7 NMI button
4 System error LED (yellow)8 Network activity LED (green)
 9 System ID button with system ID LED (blue)
 10 System error LED (yellow)
 11 XCC system management port

1 Power status LED (green) / 5 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:

StatusColorDescription
OffNoneNo power supply is properly installed, or the LED itself has failed.
Flashing rapidly (four times per second)GreenThe 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)GreenThe server is turned off and is ready to be turned on. You can press the power button to turn on the server.
LitGreenThe server is turned on.

2 / 8 Network activity LED (green)​

When this LED is flashing, it indicates that the server is transmitting to or receiving signals from the Ethernet LAN.

3 System ID LED (blue) / 9 System ID button with system ID LED (blue)​

Use the system ID button and the blue system ID LED to visually locate the server. Each time you press the system ID button, the state of the system ID LED changes. The LED 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 LED to assist in visually locating the server among other servers.

4 / 10 System Error LED (yellow)​

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

StatusColorDescriptionAction
OnYellow
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.

OffNoneThe server is off or the server is on and is working correctly.None.

6 Security LED (green)​

The states of security LED are as following:
  • Solid on: The server is operating with security feature enabled.
  • Blinking: The server is in System Lockdown Mode. Activate or unlock the system for operation.
  • Off: No security feature is enabled on the server.

7 NMI button​

Press this button to force a nonmaskable interrupt to the processor. You might have to use a pen or the end of a straightened paper clip to press the button. You can also use it to force a blue-screen memory dump. Use this button only when you are directed to do so by Lenovo Support.

11 XCC system management port LEDs​

Figure 2. XCC system management port LEDs
XCC system management port LEDs
LEDDescription
1 XCC system management port (1GB RJ-45) Ethernet port link LED
Use this green LED to distinguish the network connectivity status:

  • Off: The network link is disconnected.

  • Green: The network link is established.

2 XCC system management port (1GB RJ-45) Ethernet port activity LED
Use this green LED to distinguish the network activity status:

  • Off: The server is disconnected from a LAN.

  • Blinking: The network is connected and active.