8Pull the drive out of the chassis, then remove the rails on both sides of the drive.

9Snap the rails onto the new drive in the same positions. The rails are labeled. Make sure the front rail extensions are to the front of the drive.

Important The rails on the CD drive are different from those on the 3.5-inch drives. Make sure you install the correct rails on the CD drive.

10Align the rails with the open bay, then slide the drive into the bay until the locking tabs snap into place.

11Connect the power and data cables, making sure the cables are in their original positions. (See your drive documentation for proper cable orientation.)

12Replace the bezel. (See “Replacing the bezel” on page 28.)

13Close the case. (See “Closing the case” on page 27.)

14Reconnect the power cord, the modem cord, and all other external peripheral devices, then turn on the system.

48Replacing and Adding System Components