NOTE: The color of your computer and certain components may appear differentlythan shown in this document.To avoid damaging your computer, perform the following steps before you beginworking inside the computer.1. Ensure that your work surface is flat and clean to prevent the computercover from being scratched.2. Turn off your computer (seeTurning Off Your Computer).3. If the computer is connected to a docking device (docked) such as theoptional Media Base or Battery Slice, undock it.CAUTION: To disconnect a network cable, first unplug the cable from yourcomputer and then unplug the cable from the network device.4. Disconnect all network cables from the computer.5. Disconnect your computer and all attached devices from their electricaloutlets.6. Close the display and turn the computer upside-down on a flat worksurface.NOTE: To avoid damaging the system board, you must remove the main batterybefore you service the computer.7. Remove the main battery.8. Turn the computer top-side up.9. Open the display.10. Press the power button to ground the system board.CAUTION: To guard against electrical shock, always unplug your computer from theelectrical outlet before opening the display.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.11. Remove any installed ExpressCards or Smart Cards from the appropriateslots.Recommended ToolsThe procedures in this document may require the following tools:• Small flat-blade screwdriver10