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Adding and Replacing Parts
Dell™Latitude™D420User'sGuide
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:
l You have performed the steps in Turning Off Your Computer and Before Working Inside Your Computer.
l YouhavereadthesafetyinformationinyourDell™Product Information Guide.
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)
Turning Off Your Computer
1. Shut down the operating system:
a. Save and close any open files, exit any open programs, click Start® Shut Down.
b. Select Shut down® OK.
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.
1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.
2. Turn off your computer (see Turning Off Your Computer).
Before You Begin
Keyboard
Hard Drive
Memory
Removing the Hard Drive
Mini-Cards
Dismantling the Hard Drive
Subscriber Identity Module (SIM) Card
Replacing the Hard Drive
Internal Card With Bluetooth®
Wireless Technology
Hinge Cover
Coin-Cell Battery
NOTICE: To avoid losing data, save and close any open files and exit any open programs before you turn off your computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: 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: Damage due to servicing that is not authorized by Dell is not covered by your warranty.
NOTICE: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have a connector with 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: To prevent damage to the computer, perform the following steps before you begin working inside the computer.