Removing And Installing Parts; Before You Begin; Recommended Tools; Turning Off Your Computer - Dell Dimension C521 Owner's Manual

Removing and Installing Parts

Before You Begin

This chapter provides procedures for removing and installing the components in your computer.
Unless otherwise noted, each procedure assumes that the following conditions exist:
• You have performed the steps in "Turning Off Your Computer" and "Before Working Inside Your
Computer" on page 60.
• You have read the safety information in your Dell™ Product Information Guide.
NOTE:
Unless otherwise noted, a component can be replaced or—if purchased separately—installed by
performing the removal procedure in reverse order.

Recommended Tools

The procedures in this document may require the following tools:
• Small flat-blade screwdriver
• Phillips screwdriver
• Flash BIOS executable update program on support.dell.com

Turning Off Your Computer

NOTICE:
To avoid losing data, save and close any open files and exit any open programs before you turn off
your computer.
1 Shut down the operating system:
Save and close any open files, exit any open programs, click the Start button, and then click
a
Turn Off Computer.
In the Turn off computer window, click Turn off.
b
The computer turns off after the operating system shutdown process finishes.
2 Ensure that the computer and any 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 4 seconds.
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