Before You Begin - Dell Dimension C521 Service Manual

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Before You Begin
Dell™ Dimension™ C521 Service Manual
Getting Started
Recommended Tools
Turning Off Your Computer
Before Working Inside Your Computer
Getting Started
This manual provides procedures for removing and replacing the components in your computer. Unless otherwise noted, each procedure assumes that the
following conditions exist:
You have performed the steps in
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You have read the safety information in your Dell™ Product Information Guide.
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A component can be replaced by performing the removal procedure in reverse order. Directional instructions are also performed on the reverse.
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Recommended Tools
The procedures in this document may require the following tools:
Small flat-blade screwdriver
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Phillips #0, #1, and #2 screwdrivers
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Flash BIOS update program (download from support.dell.com)
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Turning Off Your Computer
NOTICE:
1. Shut down the operating system:
a. Save and close any open files, exit any open programs, click the Start button, and then click Shut Down.
b. In the Shut Down Windows window, select Shut Down.
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.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.
CAUTION:
CAUTION:
mounting bracket. Hold a component such as a processor by its edges, not by its pins.
NOTICE:
covered by your warranty.
NOTICE:
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.
NOTICE:
1. Follow the steps in
Great user manuals database on
Turning Off Your Computer
To avoid losing data, save and close any open files and exit any open programs before you turn off your computer.
Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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
Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not
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
To avoid damaging the computer, perform the following steps before you begin working inside the computer.
Turning Off Your Computer.
UserManuals.info
and Before Working Inside Your Computer.