3  Network activity LED (green)
The network activity LED on the front panel helps you identify the network connectivity and activity.
Status Color Description
On Green
The server is connected to a network.
Blinking
Green
The network is connected and active.
Off
None The server is disconnected from the network.
4  System ID button with system ID LED (blue)
Use this system ID button and the blue system ID LED to visually locate the server. A system ID LED is also 
located on the rear 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.
If the XClarity Controller USB connector is set to have both the USB 2.0 function and XClarity Controller 
management function, you can press the system ID button for three seconds to switch between the two 
functions.
5  System error LED (yellow)
The system error LED provides basic diagnostic functions for your server.
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.
•  A fan has been removed.
•  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.
6  USB 3.2 Gen 1 connector
Used to attach a device that requires a USB 2.0 or 3.2 Gen 1 connection, such as a keyboard, a mouse, or a 
USB flash drive.
7  USB 2.0 connector with Lenovo XClarity Controller management
Depending on the setting, this connector supports USB 2.0 function, XClarity Controller management 
function, or both. 
Chapter 2. Server components 23