Dell T320 owner manual To the system is turned off

Item	Indicator, Button, or	Icon	Description
	Connector
3	Power-on indicator, power		The power-on indicator lights when the system power is
	button		on. The power button controls the power supply output to
			the system.
			NOTE: On ACPI-compliant operating systems, turning
			off the system using the power button causes the
			system to perform a graceful shutdown before power
			to the system is turned off.
4	NMI button		Used to troubleshoot software and device driver errors
			when running certain operating systems. This button can
			be pressed using the end of a paper clip.
			Use this button only if directed to do so by qualified
			support personnel or by the operating system
			documentation.
5	System identification button		The identification buttons on the front and back panels of
			the system can be used to locate a particular system
			within a rack. When one of these buttons is pressed, the
			LCD panel on the front chassis and the system status
			indicator on the back chassis flash until one of the buttons
			is pressed again.
			Press to toggle the system ID on and off.
			If the system stops responding during POST, press and
			hold the system ID button for more than five seconds to
			enter BIOS progress mode.
			To reset iDRAC (if not disabled in F2 iDRAC setup), press
			and hold for more than 15 seconds.
6	Information tag		A slide-out label panel which allows you to record system
			information such as Service Tag, NIC, MAC address, and
			so on.
7	Diagnostic indicators		The diagnostic indicators light up to display error status.
8	USB connectors (2)		Allow you to connect USB devices to the system. The
			ports are USB 2.0-compliant.

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