HP ProBook 6555b Notebook-PC - Manual (Page 95)

4. Align the tabs (1) on the hard drive cover with the notches on the computer.
5. Replace the cover (2).
6. Tighten the hard drive cover screws (3).
7. Replace the battery.
8. Turn the computer right-side up, and then reconnect external power and external devices.
9. Turn on the computer.
Replacing a hard drive in the hard drive bay 85