WARNING: Before working inside your computer, read the safetyinformation that shipped with your computer. For more safety bestpractices, see the Regulatory Compliance home page atwww.dell.com/regulatory_compliance.WARNING: Disconnect all power sources before opening thecomputer cover or panels. After you finish working inside thecomputer, replace all covers, panels, and screws before connecting tothe power source.CAUTION: To avoid damaging the computer, ensure that the worksurface is flat and clean.CAUTION: To avoid damaging the components and cards, handlethem by their edges and avoid touching pins and contacts.CAUTION: You should only perform troubleshooting and repairs asauthorized or directed by the Dell technical assistance team. Damagedue to servicing that is not authorized by Dell is not covered by yourwarranty. See the safety instructions that shipped with the product orat www.dell.com/regulatory_compliance.CAUTION: Before touching anything inside your computer, groundyourself by touching an unpainted metal surface, such as the metal atthe back of the computer. While you work, periodically touch anunpainted metal surface to dissipate static electricity, which couldharm internal components.CAUTION: When you disconnect a cable, pull on its connector or onits pull tab, not on the cable itself. Some cables have connectors withlocking tabs or thumb-screws that you must disengage beforedisconnecting the cable. When disconnecting cables, keep themevenly aligned to avoid bending any connector pins. When connectingcables, ensure that the ports and connectors are correctly orientedand aligned.CAUTION: Press and eject any installed card from the media-cardreader.Recommended toolsThe procedures in this document may require the following tools:• Phillips screwdriver11