Recommended Tools; Before Working On Your Computer; Turning Off Your Computer - Dell Vostro 420 Service Manual

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Working on Your Computer
Dell™ Vostro™ 420/220/220s Service Manual
Recommended Tools
Before Working on Your Computer
Inside View of Your Computer
System Board Components
After Working on Your Computer
This document provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that:
You have performed the steps in
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You have read the safety information that shipped with your computer.
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When replacing a component, you have already removed the original, if installed.
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NOTE: The color of your computer and certain computer components may appear differently than shown in this document.
Recommended Tools
The procedures in this document may require the following tools:
Small flat-blade screwdriver
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Phillips screwdriver
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Small plastic scribe
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Flash BIOS update (see the Dell Support website at support.dell.com)
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Before Working on Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.
CAUTION:
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
NOTICE:
covered by your warranty.
NOTICE:
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. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.
2. Turn off your computer (see
NOTICE:
3. Disconnect all telephone or network cables from the computer.
4. Disconnect your computer and all attached devices from their electrical outlets.
5. Press and hold the power button while the system is unplugged to ground the system board.
NOTICE:
computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal components.

Turning Off Your Computer

NOTICE:
1. Shut down the operating system.
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Working on Your
Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
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 pull-tab, not on the cable itself. Some cables have connectors with locking tabs; if
To avoid damaging the computer, perform the following steps before you begin working inside the computer.
Turning Off Your Computer).
To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
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Computer.