To remove the primary hard-disk drive, perform the following steps:
[*]Remove the front bezel.
[*]Rotate the power supply away from the system board.
[*]While holding the power supply, place the computer in the upright position.
[*]Remove the two screws securing the hard-disk drive to the front of the chassis.
[*]Release the clip that secures the drive to the chassis, and rotate the drive out of the chassis.
[*]Disconnect any cables attached to the drive.
[*]Remove the existing drive from the bay.