Dell R510 owner manual Five seconds, NMI button Used to troubleshoot software

Item	Indicator, Button,	Icon	Description
	or Connector
2	Power-on indicator/		The power-on indicator lights
	power button		when the system power is on.
			The power button controls the
			DC power supply output to the system.
			When the optional system bezel is
			installed, the power button is not
			accessible.
			NOTE: When powering on the system,
			the video monitor can take from several
			seconds to over 2 minutes to display an
			image, depending on the amount of
			memory installed in 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.
			NOTE: To force an ungraceful shutdown,
			press and hold the power button for
			five seconds.
3	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.
4	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.
5	Hard drives		Up to twelve 3.5-inch or 2.5-inch,
			hot-swappable SAS or SATA drives.

About Your System

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