HP Pro 3420 Maintenance & Service Manual page 53

4. Push the drive out of the computer (2) to disconnect the drive from the connector, and then
remove the drive from the computer.
Figure 7-11 Removing the optical drive
5. If you need to remove the bracket from the optical drive, remove the two screws (1) that secure
the bracket to the drive, and then remove the bracket from the drive (2).
Figure 7-12 Removing the optical drive bracket
Optical Drive 45