Dell 1U920 When Using Your Computer (continued)

10 Setup and Quick Reference Guide

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Before you open the computer cover, perform the following steps in the sequence indicated.

CAUTION: Do not attempt to service the computer yourself, except as explained in

your online Dell™ documentation or in instructions otherwise provided to you by Dell.

Always follow installation and service instructions closely.

NOTICE: To help avoid possible damage to the system board, wait 5 seconds after turning off the computer

before removing a component from the system board or disconnecting a device from the computer.

1Perform an orderly computer shutdown using the operating system menu.

2Turn off your computer and any devices connected to the computer.

3Ground yourself by touching an unpainted metal surface on the chassis, such as the metal at the

back of the computer, before touching anything inside your computer.

While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate

any static electricity that might harm internal components.

4Disconnect your computer and devices, including the monitor, from their electrical outlets. Also,

disconnect any telephone or telecommunication lines from the computer.

Doing so reduces the potential for personal injury or shock.

In addition, take note of these safety guidelines when appropriate:

• When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable

itself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable,

press in on the locking tabs before disconnecting the cable. As you pull connectors apart, keep them

evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that

both connectors are correctly oriented and aligned.

• Handle components and cards with care. Do not touch the components or contacts on a card.

Hold a card by its edges or by its metal mounting bracket. Hold a component such as a

microprocessor chip by its edges, not by its pins.

CAUTION: There is a danger of a new battery exploding if it is incorrectly installed. Replace

the battery only with the same or equivalent type recommended by the manufacturer. Do not

dispose of the battery along with household waste. Contact your local waste disposal agency

for the address of the nearest battery deposit site.

When Using Your Computer (continued)