Dell R210 owner manual Enables or disables the NMI feature, NMI Button Disabled default

Option	Description
TPM Clear	CAUTION: Clearing the TPM will lose all encryption
(No default)	keys in the TPM. This option prevents booting to the
	operating system and results in data loss if the
	encryption keys cannot be restored. Back up the TPM
	keys prior to enabling this option.
	When set to Yes, all TPM contents are cleared.
	NOTE: This field is read-only when TPM Security is set
	to Off.
Power Button	If Enabled, the power button can turn the system's power
(Enabled default)	off and on. On an ACPI-compliant operating system, the
	system performs an orderly shutdown before power is
	turned off.
	When Disabled, the button can only turn on system
	power.
NMI Button	CAUTION: Use the NMI button only if directed to do
(Disabled default)	so by qualified support personnel or by the operating
	system's documentation. Pressing this button halts
	the operating system and displays a diagnostic
	screen.
	Enables or disables the NMI feature.
AC Power Recovery	Determines how the system reacts when power is
(Last default)	restored. If set to Last, the system returns to the last
	power state. On turns on the system after power is
	restored. Off allows the system to remain off after power
	is restored.
AC Power Recovery	Determines when the system restarts after power is
Delay	restored. Options are Immediate, Random (a random
	value of 45 to 240 seconds), or a user-defined value of 45
	to 240 seconds.
User Defined Delay	Allows the user to view the current AC Recovery Delay.
	This field also allows the user to define a new AC
	Recovery Delay.

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Using the System Setup Program and UEFI Boot Manager