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 shippedwith your computer.WARNING: Before working inside your computer, read the safety information that is shipped with yourcomputer. For more 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 you finish working inside the computer, replace all covers, panels, and screws before connecting yourcomputer to an electrical outlet.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 thepins and the contacts.CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technicalassistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See thesafety instructions that 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 metalsurface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metalsurface to dissipate static electricity 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 cableshave connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable.When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connectingcables, ensure that the ports and the 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 usedand should 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 computerAbout this taskNOTE: The images in this document may differ from your computer depending on the configuration you ordered.Steps1. Save and close all open files and exit all open applications.2. Shut down your computer. For Windows operating system, click Start > Power > Shut down.4Working inside your computer 29