Working inside your computerSafety instructionsUse the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unlessotherwise noted, each procedure included in this document assumes that you have read the safety information that shipped with yourcomputer.WARNING: Before working inside your computer, read the safety information that is shipped with your computer. Formore safety best practices, see the Regulatory Compliance home page at www.dell.com/regulatory_compliance.WARNING: Disconnect your computer from all power sources before opening the computer cover or panels. After youfinish working inside the computer, replace all covers, panels, and screws before connecting your computer to an electricaloutlet.CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the pins and thecontacts.CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistanceteam. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructionsthat is shipped with the product or at www.dell.com/regulatory_compliance.CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, suchas the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate staticelectricity which could harm internal components.CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables haveconnectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable. When disconnectingcables, keep them evenly aligned to avoid bending the connector pins. When connecting cables, ensure that the ports andthe connectors are correctly oriented and aligned.CAUTION: Press and eject any installed card from the media-card reader.CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used andshould be replaced and disposed properly.NOTE: The color of your computer and certain components may appear differently than shown in this document.Before working inside your computerNOTE: The images in this document may differ from your computer depending on the configuration you ordered.Before you beginSteps1. Save and close all open files and exit all open applications.2. Shut down your computer. Click Start > Power > Shut down.NOTE: If you are using a different operating system, see the documentation of your operating system for shut-downinstructions.6