Lenovo RD540 manual Power switch with power status LED, ID button with ID LED

The following illustration shows the controls, connectors, and LEDs on the front panel of the server.

Figure 11. Front panel

	Power switch with power status LED		System error LED
1		5
	ID button with ID LED		Front USB connector 1
2		6
	Network Interface Controller (NIC) 1 status LED		Front USB connector 2
3		7
	NIC 2 status LED		Front VGA DB-15 connector (available in some models)
4		8

1

Power switch with power status LED

You can press the power switch to turn on the server when you finish setting up the server. You also can hold the power switch for several seconds to turn off the server if you cannot turn it off from the operating system. See Chapter 4 “Turning on and turning off the server” on page 49. The power status LED helps you to determine the current power status.

Power status LED	Color	Description
On	Green	The server is on.
Off	None	The server is off.
Blinking	Green	The server is in ACPI S1 mode, which also is known
		as Power On Suspend (POS) mode. In this mode, the
		microprocessor is not working while other hardware
		devices are still working.

2

ID button with ID LED

When you press the ID button, the ID LEDs on both the front and rear of the server are lit to help you locate the server among other servers. You also can turn on the ID LEDs using a remote management program for server presence detection.

ID LED	Color	Description
On	Blue	The system is identified.
Off	None	The ID LED is not in use or the system is not
		identified.

Chapter 3. Product overview 19