Dell Precision R5400 (Mid 2008) - Manual (Page 4)

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Before Working on Your Computer
Dell Precision™ R5400 Service Manual
Recommended Tools
What You Need to Know For Your Safety
This document provides procedures for removing and installing components in your computer. Unless otherwise noted, each procedure assumes that:
l You have performed the steps in this section.
l You have read the safety information that shipped with your computer.
l When replacing a component, you have already removed the original, if installed.
Recommended Tools
The procedures in this document may require the following tools:
l Small flat-blade screwdriver
l Phillips screwdriver
l Small plastic scribe
l Flash BIOS update (see the Dell Support website at support.dell.com)
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.
1. Shut down your computer.
l In Microsoft Windows Vista®, click Start , click the arrow icon, and then click Shut Down to turn off your computer.
l In Microsoft
®
Windows
®
XP, click Start® Shutdown® Shutdown.
2. Disconnect your computer and all attached devices from their electrical outlets.
3. Disconnect any network cables from the computer.
4. If applicable, remove the computer from the rack (see the Rack Installation Guide for instructions).
CAUTION: Only trained service technicians are authorized to remove the computer cover and access any of the components inside the computer.
Before working inside the computer, read the safety information that shipped with the computer. For additional safety best practices information,
see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer. For additional
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
NOTICE: Only a certified service technician should perform repairs on your computer. Only trained service technicians are authorized to remove the
computer cover and access any of the components inside the 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.
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 6 seconds.
NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network wall jack.