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Before You Begin
Dell™XPS™L511zServiceManual
Recommended Tools
Turning Off Your Computer
Before Working Inside Your Computer
This manual 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 You have read the safety information that shipped with your computer.
l A component can be replaced or—if purchased separately—installed by performing the removal procedure in reverse order.
Recommended Tools
The procedures in this document may require the following tools:
l Small flat-blade screwdriver
l Phillips screwdriver
l Plastic scribe
l BIOS executable update program available at support.dell.com
Turning Off Your Computer
1. Save and close all open files and exit all open programs.
2. To shut down the operating system, click Start and then click Shut Down.
3. Ensure that the computer is turned off. If your computer did not automatically turn off when you shut down the operating system, press and hold the
power button until the computer turns off.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help to 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) and all attached devices.
WARNING: 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 at www.dell.com/regulatory_compliance.
CAUTION: 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 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.
