HP ProBook 455 G1 Notebook PC - Manual (Page 60)

3. With the battery bay toward you, slide the service door towards the battery bay until the service
door snaps into place (4) and, if you choose to, insert and tighten the optional screw (5) to hold
the service door in place (see Using the optional security screw on page 48 ).
4. Insert the battery (see Inserting or removing the battery on page 40 ).
Replacing or upgrading the hard drive
CAUTION: To prevent information loss or an unresponsive system:
Shut down the computer before removing the hard drive from the hard drive bay. Do not remove the
hard drive while the computer is on, in the Sleep state, or in Hibernation.
If you are not sure whether the computer is off, turn the computer on by pressing the power button.
Then shut down the computer through the operating system.
Removing the hard drive
To remove a hard drive:
1. Save your work and shut down the computer.
2. Disconnect AC power and external devices connected to the computer.
3. Turn the computer upside down on a flat surface.
4. Remove the battery (see Inserting or removing the battery on page 40 ).
5. Remove the service door (See Removing or replacing the service door on page 49 ).
50 Chapter 8 Drives