Dell OptiPlex 755 - Manual (Page 121)

5. Grasp the sliding plate lever and slide it towards the bottom of the computer until the drive panel snaps open; while holding the lever in place, slide the
media card reader out of the computer.
Installing the Media Card Reader
1. If you are replacing a media card reader, remove the shoulder screws from the existing drive and attach the screws to the replacement media card
reader.
2. If you are installing a new media card reader, remove the drive-panel insert for the 3.5-inch drive bay, remove the shoulder screws from the inside of
the drive-panel insert and attach the screws to the new drive.
3. Align the shoulder screws on the media card reader with the shoulder screw slots, and gently slide it into the bay until it clicks into place.
4. Attach the cable to the media card reader and to the system board.
NOTE: If you are replacing an existing floppy drive with a media card reader, ensure you disable the floppy before installing the media card
reader. Boot your computer and enter system setup (see Entering System Setup ). Use the Diskette Drive option to disable the floppy drive.
Follow instructions in Removing the Floppy Drive .
1 media card reader 2 shoulder screws (4) 3 shoulder screw slots (2)