Safety Instructions

Use the following safety guidelines to help protect your computer system from poten- tial damage and to ensure your own personal safety.

NOTICE: Your computer is designed to work only while upright in the stand shipped with it. Do not attempt to place the computer flat on a desktop, and do not set heavy objects, such as a monitor, on top of the computer.

When Using Your Computer System

As you use your computer system, observe the following safety guidelines.

CAUTION: Do not operate your computer system with any cover(s) (includ- ing computer covers, bezels, filler brackets, front-panel inserts, and so on) removed.

To help avoid damaging your computer, be sure the voltage selection switch on the power supply is set to match the AC power available at your location:

100 volts (V)/50 hertz (Hz) in eastern Japan and 100 V/60 Hz in western Japan

115 V/60 Hz in most of North and South America and some Far Eastern coun- tries such as South Korea and Taiwan

230 V/50 Hz in most of Europe, the Middle East, and the Far East

Also be sure your monitor and attached devices are electrically rated to operate with the AC power available in your location.

Before working inside the computer, unplug the system to help prevent electric shock or system board damage. Certain system board components continue to receive power any time the computer is connected to AC power.

Before disconnecting a device from the computer, disconnect the power cable to your computer and then press the power button to help avoid possible damage to the system board.

To help prevent electric shock, plug the computer and device power cables into properly grounded power sources. These cables are equipped with three-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove the

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Dell 900 manual Safety Instructions, When Using Your Computer System