HP Compaq Pro 4300 All-in-One Hardware Reference Manual page 35

8.
To remove the drive access panel, push downward on the tab on the inside edge of the panel (1)
and slide the panel off the computer (2).
Figure 2-37
Removing the Drive Access Panel
9. Remove the screw through the tab on the end of the drive that secures the drive to the computer.
Figure 2-38
Removing the Optical Disc Drive Security Screw
Replacing the Optical Disc Drive
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