2. Replace the screws that secure the system board to the chassis.
3. Connect the cables that you removed from the system board.
4. Replace the processor (see Replacing the Processor).
5. Replace the processor fan and the heat sink assembly (see Replacing the Processor Fan and Heat Sink Assembly).
6. Replace the memory modules into the memory sockets at the same locations from which you removed them (see Replacing Memory).
7. Replace the optical drive (see Replacing an Optical Drive).
8. Replace any add-in cards on the system board (see Replacing PCI and PCI Express Cards).
9. Replace the support bracket (see Replacing the Support Bracket).
10. Replace the computer cover (see Replacing the Computer Cover).
11. Connect your computer and devices to an electrical outlet, and turn them on.
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