Front LEDs and buttons

The following illustration shows LEDs and buttons on the front of the compute node.

Figure 1. Front LEDs and buttons
Front LEDs and buttons
Table 1. Front LEDs and buttons
1 25 Gb SFP28 Ethernet port link and activity LED (green) 5 M.2 drive activity LED (green)
2 1 Gb RJ45 Ethernet port link LED (green) 6 Identification button / LED (blue)
3 1 Gb RJ45 Ethernet port activity LED (green) 7 System error LED (yellow)
4 Node power button / LED (green) 8 NMI pinhole

1 25 Gb SFP28 Ethernet port link and activity LED (green): Use this green LED to distinguish the network status.

2 1 Gb RJ45 Ethernet port link LED (green): Use this green LED to distinguish the network status.

3 1 Gb RJ45 Ethernet port activity LED (green): Use this green LED to distinguish the network status.

4 Node power button / LED (green): When this LED is lit (green), it indicates that the compute node has power. This green LED indicates the power status of the compute node:
5 M.2 drive activity LED (green):
6 Identification button / LED (blue): Use this blue LED to visually locate the compute node among others. This LED is also used as a presence detection button. You can use Lenovo XClarity Administrator to light this LED remotely.
Note: The behavior of this LED is determined by the SMM2 ID LED when SMM2 ID LED is turned on or blinking. For the exact location of SMM2 ID LED, see System Management Module 2 (SMM2).
Table 2. Different SMM2 ID LED modes and Node ID LED behaviors
SMM2 identification LED Node identification LEDs
Off When this option is activated, SMM2 ID LED would first turn off the ID LED on all the compute nodes in the enclosure and enter the accept mode, in which the LED behavior is determined by the node ID LEDs (see Enclosure Rear Overview for more information).
On All of the node ID LEDs will be on except the blinking ones, which will remain blinking.
Blink All of the node ID LEDs will be blinking regardless of previous status.

7 System error LED (yellow): When this LED (yellow) is lit, it indicates that at least one system error has occurred. Check the event log for additional information.

8 NMI pinhole: Insert the tip of a straightened paper clip into this pinhole to force a non-maskable interrupt (NMI) upon the node, and consequent memory dump would take place. Only use this function while advised by Lenovo support representative.