Front I/O module

The front I/O module provides controls, connectors and LEDs. The front I/O module varies by model.

Front I/O module (on rack latch)

Front I/O module (on media bay)

Table 1. Components on the front I/O module

Callout	Callout
1 USB 3 (5 Gbps) connector	2 USB 2.0 connector
3 Power button with power status LED	4 Network activity LED (for OCP module)
5 System ID button with system ID LED	6 System error LED
7 Front operator panel

1/2 USB 3 (5 Gbps) connector/ USB 2.0 connector

The USB connector can be used to attach a USB-compatible device, such as a USB keyboard, USB mouse, or USB storage device.

3 Power button with power status LED

You can press this button to turn the server on and off manually. The power status LED helps you determine the current power status.

Status	Color	Description
Off	None	Power is not present, or the power supply has failed.
Fast blinking (about four flashes per second)	Green	The server is off, but the XClarity Controller is initializing, and the server is not ready to be powered on.
Slow blinking (about one flash per second)	Green	The server is off and is ready to be powered on (standby state).
Solid on	Green	The server is on and running.

4 Network activity LED

Compatibility of the NIC adapter and the network activity LED:

NIC adapter	Network activity LED
OCP module	Support
PCIe NIC adapter	Not support

When an OCP module is installed, the network activity LED on the front I/O assembly helps you identify the network connectivity and activity. If no OCP module is installed, this LED is off.

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. Note If the network activity LED is off when an OCP module is installed, check the network ports in the rear of your server to determine which port is disconnected.

5 System ID button with system ID LED

Use this 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.

6 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.

Status	Color	Description	Action
On	Yellow	An error has been detected on the server. Causes might include but are not limited to the following errors: A fan failure A memory error A storage failure A PCIe device failure A power supply failure A processor error A system I/O board or processor board error	Check the Lenovo XClarity Controller event log and the system event log to determine the exact cause of the error. Check if additional LEDs elsewhere in the server are also lit that will direct you to the source of the error. See Troubleshooting by system LEDs and diagnostics display. Save the log if necessary.
Off	None	The server is off, or the server is on and is working correctly.	None.

7 Front operator panel

The front operator panel provides controls and LEDs, including the power button with power status LED, network activity LED, system ID button with system ID LED, and system error LED.