Dell T3400 manual Power button Press to turn on the computer, Perform an operating system shutdown

5	IEEE 1394 connector	Use the optional IEEE 1394 connector for high-speed
	(optional)	data devices such as digital video cameras and external
		storage devices.
6	USB 2.0 connectors	Use the front USB connectors for devices that you
	(2)	connect occasionally, such as flash memory keys or
		cameras, or for bootable USB devices (see "System
		Setup" in your User’s Guide for more information on
		booting to a USB device).
		NOTE: It is recommended that you use the back USB
		connectors for devices that typically remain connected,
		such as printers and keyboards.
7	power button	Press to turn on the computer.
		NOTICE: To avoid losing data, do not use the
		power button to turn off the computer. Instead,
		perform an operating system shutdown.

NOTICE: If your operating system has ACPI enabled, when you press the power button the computer will perform an operating system shutdown.

NOTE: The power button can also be used to wake the system or to place it into a power-saving state (see "Power Management" in your User’s Guide).

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Quick Reference Guide