Installing the I/O Panel1. Place the I/O panel into the slot.2. Align and slide the I/O panel clamp in the I/O panel clamp slot.3. Replace and tighten the screw that secures the I/O panel.4. Reconnect the cables to the system board.5. Replace the bezel (see Replacing the Bezel).6. Replace the computer cover (see Replacing the Computer Cover).7. Connect your computer and devices to an electrical outlet, and turn them on.8. Verify that the computer works correctly by running the Dell Diagnostics (see Dell Diagnostics).System BoardRemoving the System Board1. Follow the procedures in Before You Begin.2. Remove the computer cover (see Removing the Computer Cover).1 securing screw 2 I/O panel3 I/O cable connectorNOTICE: Take care not to damage the cable connectors and the cable routing clips when sliding the I/O panel into the computer.NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer.CAUTION: To guard against electrical shock, laceration by moving fan blades, or other unexpected injuries, always unplug your computer fromthe electrical outlet before opening the cover.CAUTION: The heat sink assembly, power supply, and other components may become very hot during normal operation. Be sure that they havehad sufficient time to cool before you touch them.NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of thecomputer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
