Dell R515 owner manual AC power and an error has been

Item	Indicator, Button,	Icon	Description
	or Connector
2	NMI button		Used to troubleshoot software and
			device driver errors when using 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's documentation.
3	Video connector		Connects a monitor to the system.
4	LCD menu buttons		Allows you to navigate the control panel
			LCD menu.
5	LCD panel		Provides system ID, status information,
			and system error messages.
			The LCD lights blue during normal
			system operation. The LCD lights
			amber when the system needs attention,
			and the LCD panel displays an error
			code followed by descriptive text.
			NOTE: If the system is connected to
			AC power and an error has been
			detected, the LCD lights amber
			regardless of whether the system
			has been powered on.
6	System identification		The identification buttons on the front
	button		and back panels can be used to locate
			a particular system within a rack.
			When one of these buttons is pushed,
			the LCD panel on the front and the blue
			system status indicator on the back blink
			until one of the buttons is pushed again.
7	USB connectors (2)		Connect USB devices to the system.
			The ports are USB 2.0-compliant.

About Your System

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