Compaq DESKPRO 2000 SERIES Maintenance & Service Manual page 156

5. Remove the single screw on the left of the drive that secures the drive in the chassis.
6. Pull the 3.5-inch drive straight out of the chassis.
Figure 5-38. Removing the 3.5-Inch Diskette Drive
Compaq Deskpro 2000 5-43