Dell 1900 Button Is on, To the system, Immediately after the power button is pressed, NMI button

Table 1-2. Front-Panel Components (continued)

Item	Component	Icon	Description
2	Power-on indicator, power		The power-on indicator lights when the system power
	button		is on.
			The power button controls the DC power supply output
			to the system.
			NOTE: If you turn off the system using the power button
			and the system is running an ACPI-compliant operating
			system, the system performs a graceful shutdown before
			the power is turned off. If the system is not running an
			ACPI-compliant operating system, the power is turned off
			immediately after the power button is pressed.
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 button		The identification buttons on the front 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	LCD panel		Provides system ID, status information, and system error
			messages.

The LCD lights blue during normal system operation. Both the system management software and the identification buttons located on the front and back of the system can cause the LCD to flash blue to identify a particular system.

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.

12

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