Before working inside your computerTo avoid damaging your computer, perform the following steps before you begin working inside thecomputer.1. Ensure that you follow the Safety instructions.2. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.3. Turn off your computer (see Turning off your computer).4. If the computer is connected to a docking device (docked) such as the optional Media Base orBattery Slice, undock it.CAUTION: To disconnect a network cable, first unplug the cable from your computer andthen unplug the cable from the network device.5. Disconnect all network cables from the computer.6. Disconnect your computer and all attached devices from their electrical outlets.7. Close the display and turn the computer upside-down on a flat work surface.NOTE: To avoid damaging the system board, remove the main battery before you service thecomputer.8. Remove the main battery.9. Turn the computer top-side up.10. Open the display.11. Press the power button to ground the system board.CAUTION: Before touching anything inside your computer, ground yourself by touching anunpainted metal surface, such as the metal at the back of the computer. While you work,periodically touch an unpainted metal surface to dissipate static electricity, which couldharm internal components.12. Remove any installed ExpressCards or Smart Cards from the appropriate slots.Turning off your computerTurning off your computer — Windows 7CAUTION: To avoid losing data, save and close all open files and exit all open programs beforeyou turn off your computer.1. Click Start.2. Click Shut Down.NOTE: Ensure that the computer and all attached devices are turned off. If your computer andattached devices did not automatically turn off when you shut down your operating system,press and hold the power button for about 6 seconds to turn them off.9
