NOTE: To avoid damaging the system board, you must remove the main battery before you service thecomputer.7. Remove the main battery.8. Turn the computer top-side up.9. Press the power button to ground the system board.CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet beforeopening the display.CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metalsurface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metalsurface to dissipate static electricity, which could harm internal components.10. Remove any installed SmartCards from the slots.Turning Off Your ComputerCAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off yourcomputer.1. Shut down the operating system:– Windows 8:* Using a touch-enabled device:Swipe in from the right edge of the screen, opening the Charms menu and select Settings. Selectthe and then select Shut down* Using a mouse:Point to upper-right corner of the screen and click Settings. Click on the and then select Shutdown.2. Ensure that the computer and all attached devices are turned off. If your computer and attached devices did notautomatically turn off when you shut down your operating system, press and hold the power button for about 4seconds to turn them off.After Working Inside Your ComputerAfter you complete any replacement procedure, ensure you connect any external devices, cards, and cables beforeturning on your computer.CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do notuse batteries designed for other Dell computers.1. Connect any external devices, such as a port replicator, battery slice, or media base, and replace any cards, suchas an ExpressCard.2. Connect any telephone or network cables to your computer.CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into thecomputer.3. Replace the battery.4. Connect your computer and all attached devices to their electrical outlets.5. Turn on your computer.6