Before Working On Your Computer; Recommended Tools - Dell Precision M4400 Service Manual

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Before Working on Your Computer
Dell Precision™ Service Manual
Recommended Tools
What You Need to Know for Your Safety
Removing the Battery
Replacing the Battery
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 system and certain system 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 #0 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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What You Need to Know for Your Safety
Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.
CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage on www.dell.com at: www.dell.com/regulatory_compliance.
NOTICE: 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.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface, such
as a connector on the back of the computer.
NOTICE: 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.
NOTICE: When disconnecting a cable, pull on the cable's connector or on its strain-relief loop, not on the cable itself. For cable connectors with locking
tabs, press inward on the locking tabs to release the connector. When connecting a cable, ensure that the connectors are correctly oriented and
aligned to avoid damage to the connector and/or the connector's pins.
1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.
2. Shut down your computer.
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In Windows XP, click Start® Shutdown® Shutdown.
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In Windows Vista , click Start
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NOTE: Ensure that the computer is off and not in a power management mode. If you cannot shut down the computer using the operating system,
press and hold the power button for 4 seconds.
3. Disconnect your computer and all attached devices from their electrical outlets.
NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network wall jack.
4. Disconnect any telephone or network cables from the computer.
5. Remove any installed cards.
NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you service the computer.
Before Working on Your Computer.
, click the arrow icon, and then click Shut Down.