Dell OptiPlex 755 - Manual (Page 164)

5. Replace the optical drive (see Optical Drive ).
6. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
7. Replace the computer cover (see Replacing the Computer Cover ).
8. Enter system setup and use the Diskette Drive option to enable your new floppy drive (see System Setup ).
See the documentation that came with the drive for instructions on installing any software required for drive operation.
9. Verify that your computer works correctly by running the Dell Diagnostics (see Dell Diagnostics ).
Media Card Reader
Removing a Media Card Reader
1. Follow the procedures in Before You Begin .
2. Lay the computer on its side so that the system board is on the bottom of the inside of the computer.
3. Remove the computer cover (see Removing the Computer Cover ).
4. Remove the optical drive and carefully set it aside (see Optical Drive ).
5. Remove the cable from the media card reader connector.
6. Remove the hard drive (see Removing a Hard Drive ).
7. Disconnect the cable.
1 cable release tab 2 floppy drive data cable edge connector
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the computer cover.
NOTICE: Do not pull the drive out of the computer by the drive cables. Doing so may cause damage to cables and the cable connectors.