HP 240 Maintenance And Service Manual page 36

Component
(4)
(5)
28 Chapter 2 External component identification
Wireless and memory module
compartment
Hard drive bay
Description
Contains the wireless and memory modules.
CAUTION: To prevent an unresponsive system, replace the
wireless module only with a wireless module authorized for use in
the computer by the governmental agency that regulates wireless
devices in your country or region. If you replace the module and
then receive a warning message, remove the module to restore
computer functionality, and then contact support through Help and
Support. To access Help and Support, from the Start screen, type
help, and then select Help and Support from the list of apps.
Contains the hard drive.