HP ProBook 450 G0 Notebook PC - Manual (Page 62)

3. 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 security screw (5) to hold the service door in place.
For more information on using the optional security screw, see Using the optional security screw
on page 50 .
NOTE: If you do not want to use the optional security screw, you can store it inside the battery
bay.
4. Insert the battery (see Inserting or removing the battery on page 41 ).
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 Replacing a user-replaceable battery (select models only)
on page 43 ).
52 Chapter 8 Drives