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For information about enabling, disabling, or configuring input/output (I/O) ports and connectors, see Chapter 3, “Using the System Setup Program.” For detailed descriptions and illustrations of each port and connector on the back panel, see “I/O Ports and Connectors” in Appendix B.

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You can connect various external devices, such as a mouse and printer, to the I/O ports and connectors on the computer’s back panel. The system BIOS detects the presence of most external devices when you boot or reboot the system. When con- necting external devices to the computer, follow these guidelines:

‡Check the documentation that accompanied the device for specific installation and configuration instructions.

For example, most devices must be connected to a particular I/O port or connec- tor to operate properly. Also, external devices like a mouse or printer usually require you to load software files called device drivers into system memory before they will work. These software drivers help the computer recognize the external device and direct its operation.

‡Dell recommends that you attach external devices only while the computer is turned off unless you are instructed otherwise in the documentation for the particular device. Then turn the computer on before turning on any external devices unless the doc- umentation for the device specifies otherwise. (If the computer does not seem to recognize the device, try turning on the device before turning on the

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On the back of the computer are a security cable slot and padlock ring (see Figure 1-2) for attaching commercially available antitheft devices. Security cables for personal computers usually include a segment of galvanized cable with an attached locking device and key. To prevent unauthorized removal of the computer, loop the cable around an immovable object, insert the locking device into the security cable slot on the back of the computer, and lock the device with the key provided. Complete instructions for installing this kind of antitheft device are usually included with the device.

NOTE: Antitheft devices are of differing designs. Before purchasing such a device, make sure it will work with the cable slot on the computer.

The padlock ring allows you to secure the computer cover to the chassis to prevent unauthorized access to the inside of the computer. To use the padlock ring, insert a commercially available padlock through the ring and then lock the padlock.

Introduction 1-9