HP ProBook 6555b Notebook-PC - Manual (Page 97)

To remove a hard drive from the upgrade bay:
1. Save your work.
2. Shut down the computer and close the display.
3. Disconnect all external hardware devices connected to the computer.
4. Unplug the power cord from the AC outlet.
5. Turn the computer upside down on a flat surface, with the upgrade bay toward you.
6. Remove the battery from the computer.
7. Remove the protective screw caps (1), and then remove the 4 hard drive screws (2).
8. Loosen the upgrade bay screw (1).
Replacing a drive in the upgrade bay 87