258 Adding and Replacing Parts4 On the desktop computer, reattach the power cables to the side of the harddrive.5 Run the cables underneath the tabs, and press the tabs to close them overthe cables.6 Replace the computer cover (see "Replacing the Computer Cover" onpage 262).NOTICE: To connect a network cable, first plug the cable into the network port ordevice and then plug it into the computer.7 Connect your computer and devices to electrical outlets, and turnthem on.System BoardCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before opening the cover.NOTICE: To prevent static damage to components inside your computer, dischargestatic electricity from your body before you touch any of your computer’s electroniccomponents. You can do so by touching an unpainted metal surface on thecomputer.NOTICE: The system board and metal tray are connected and are removed as onepiece.Removing the System Board1 Follow the procedures in "Before You Begin" on page 143.2 Remove the computer cover (see "Removing the Computer Cover" onpage 145).3 Remove the front panel (see "Removing the Front Panel" on page 154).4 Remove any components that restrict access to the system board.5 Disconnect all cables from the system board.6 Before you remove the existing system board assembly, visually comparethe replacement system board to the existing system board to make surethat you have the correct part.
