15. Replace the processor and the heat sink assembly (see Replacing the Processor).
NOTICE: Ensure that the heat sink assembly is correctly seated and secure.
16.Replace any expansion cards on the system board (see Installing a PCI/PCI Express Card).
17.Replace the computer cover (see Replacing the Computer Cover).
18.Connect your computer and devices to an electrical outlet, and turn them on.
19.Flash the system BIOS, as needed.
NOTE: For information on flashing the system BIOS, see Flashing the BIOS.