HP ProBook 4446s Notebook-PC - Manual (Page 55)

To use the security screw:
1. Remove the battery. For information on the battery, see Inserting or removing the battery
on page 37 .
CAUTION: Removing a battery that is the sole power source for the computer can cause loss
of information. To prevent loss of information, save your work and initiate Hibernation or shut
down the computer through the operating system before removing the battery.
2. Remove the security screw from inside the battery bay (1) and insert it (2) to lock the service
door in place.
Removing or replacing the service door
CAUTION: To prevent information loss or an unresponsive system:
Save your work and shut down the computer before adding or replacing a memory module or hard
drive.
If you are not sure whether the computer is off or in Hibernation, turn the computer on by pressing the
power button. Then shut down the computer through the operating system.
NOTE: Your computer may look slightly different from the illustration in this section.
Removing the service door
Remove the service door to access the memory module slot, hard drive, regulatory label, and other
components.
Removing or replacing the service door 45