DELL NX046 User Manual

Adding and Replacing Parts

In the Microsoft Windows Vista™ operating system, click the Windows 

Vista Start button 

, click the arrow in the lower-right corner of the 

Start menu as shown below, and then click 

Shut Down.

The computer turns off after the operating system shutdown process 

is complete.

2 Ensure that the computer and all attached devices are turned off. If your 

computer and attached devices did not automatically turn off when you 

shut down your operating system, press and hold the power button for 

about 4 seconds to turn them off.

Use the following safety guidelines to help protect your computer from 

potential damage and to help to ensure your own personal safety.

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 processor by its edges, not by its pins.

Only a certified service technician should perform repairs on your 

computer. Damage due to servicing that is not authorized by Dell is not covered by 

your warranty.

When you disconnect a cable, pull on its connector or on its pull-tab, not 

on the cable itself. Some cables have connectors with locking tabs; if you are 

disconnecting this type of cable, press in on the locking tabs before you disconnect 

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. 

To avoid damaging the computer, perform the following steps before you 

begin working inside the computer. 

1 Ensure that the work surface is flat and clean to prevent the computer 

cover from being scratched.

2 Turn off your computer (see "Turning Off Your Computer" on page 151).