Lenovo RD540 manual NIC 1 status LED NIC 2 status LED, System error LED

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NIC 1 status LED

NIC 2 status LED

The two NIC status LEDs indicate the LAN status for the Ethernet connector 1 and Ethernet connector 2 on the rear panel of the server.

NIC status LED	Color	Description
On	Green	The server is connected to a LAN.
Off	None	The server is disconnected from a LAN.
Blinking	Green	The LAN is connected and active.

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System error LED

The system error LED helps you to determine if there are any system errors. When the system error LED is on, check the BMC for errors. Refer to the following table for the error descriptions and actions that you can take.

System error LED	Color	Description	Action
		The temperature of the server reached	• Check the BMC for errors and check
		the non-critical temperature threshold.	the system fans.
			• Ensure that the ambient temperature
			limit LED is off.
		The voltage of the server reached the	Replace the system board.
		non-critical voltage threshold.	Note: This procedure must be performed
			only by trained service personnel of
			Lenovo. See Chapter 8 “Getting
			information, help, and service” on page
			165.
		A fan has been detected to be running at	Check the system fans.
		low speed.
		A hot-swap fan has been removed.	1. Ensure that the system fans are
			connected securely to the system
On	Amber		board.
			2. Reinstall the removed fan or install a
			new fan to replace the removed fan.
		The power supply has a critical error.	Check the BMC for detailed information.
		The power cord has been disconnected	1. Ensure that the power supplies are
		from one power supply or a redundant	installed securely in the server.
		power supply has been removed.	2. Ensure that the power cords are
			connected securely to the power
			supplies.
			3. Install a new power supply to
			replace the removed one.
		The THERMTRIP# signal is asserted	• Check the BMC for errors and then
		because the system is overheated.	check the system fans.
			• Ensure that the ambient temperature
			limit LED is off.
Off	None	The server is off or the server is on and
		is working correctly.

20ThinkServer RD540 User Guide and Hardware Maintenance Manual