3Disconnect the power, data, and the sound cable, if available, from the back of the optical drive you want to remove. For most drive cables, use a gentle rocking motion to free the plug. For Serial ATA hard disk drive cables, press the latch (select models only) in the center of each plug, and pull the plug from the drive connector.
4Pull the drive out through the front of the chassis.
Adding or Replacing an Optical Drive
1If necessary, remove the existing drive. See “Removing an Optical Drive” on page 8.
2If you are adding a drive to an empty lower optical drive bay, you must remove the knockout plate from the bay. To do so, insert a flat screwdriver into the knockout plate slot (A) and rotate the screwdriver to break the knockout plate out of the chassis. Discard the knockout plate.
3Remove the knockout plate on the front cover. To do so, insert a flat screwdriver into the knockout plate slot (B) and rotate the screwdriver to break the knockout plate out of the front cover. Discard the knockout plate.
A
B 
Upgrading and Servicing Guide 9
