CAUTION: Only a certified service technician is authorized to remove thecomputer cover and access any of the components inside the computer. See thesafety instructions for complete information about safety precautions, workinginside your computer, and protecting against electrostatic discharge.CAUTION: Before touching anything inside your computer, ground yourself bytouching an unpainted metal surface, such as the metal at the back of thecomputer. While you work, periodically touch an unpainted metal surface todissipate static electricity, which could harm internal components.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 orthumb-screws that you must disengage before disconnecting the cable. Whendisconnecting cables, keep them evenly aligned to avoid bending any connectorpins. When connecting cables, ensure that the connectors and ports are correctlyoriented and aligned.CAUTION: To disconnect a network cable, first unplug the cable from yourcomputer and then unplug the cable from the network device.CAUTION: Press and eject any installed card from the8-in-1 Media Card Reader.Recommended ToolsThe procedures in this document may require the following tools:• Phillips screwdriver• Plastic scribe• Small flat-blade screwdriver8 | Before You Begin