08 08/CHAPTER 1: BEFORE YOU BEGINEnsure that the work surface is flat and clean.1.Turn off your computer (see “Turning Off Your Computer” on page2. 7).CAUTION: To disconnect a network cable, first unplug the cable fromyour computer and then unplug the cable from the network device.Disconnect all telephone or network cables from the computer.3.Disconnect your computer and all attached devices from their electrical4.outlets.Disconnect all attached devices from your computer.5.Press and eject any installed cards from the Media Card Reader.6.Press and hold the power button to ground the system board.7.CAUTION: Before touching anything inside your computer, groundyourself by touching an unpainted metal surface, such as the metal at theback of the computer. While you work, periodically touch an unpaintedmetal surface to dissipate static electricity, which could harm internalcomponents.NOTE: For better access to components within your computer, lay yourcomputer on its side.Before Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potentialdamage and to help to ensure your own personal safety.WARNING: Before you begin any of the procedures in this section, followthe safety instructions that shipped with your computer. For additionalsafety best practices information, see the Regulatory ComplianceHomepage at www.dell.com/regulatory_compliance.CAUTION: Only a certified service technician should perform repairs onyour computer. Damage due to servicing that is not authorized by Dell isnot covered by your warranty.CAUTION: When you disconnect a cable, pull on its connector or on itspull-tab, not on the cable itself. Some cables have connectors with lockingtabs; if you are disconnecting this type of cable, press in on the lockingtabs before you disconnect the cable. As you pull connectors apart, keepthem evenly aligned to avoid bending any connector pins. Also, beforeyou connect a cable, ensure that both connectors are correctly orientedand aligned.CAUTION: To avoid damaging the computer, perform the following stepsbefore you begin working inside the computer.
