HP EliteBook 2540p Notebook PC - Manual (Page 23)

Component Description
(7) Wireless compartment Contains an HP Mobile Broadband Module (select models only)
and a WLAN module (select models only).
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 technical support through
Help and Support.
(8) Optical drive bay or hard drive bay Holds an optical drive or a 2.5-inch hard drive.
NOTE: Your computer has one hard drive, either 1.8-inch or 2.5-
inch, or your computer may have two hard drives (1.8-inch and 2.5-
inch). If your computer has one hard drive, the location of the hard
drive varies.
Display components
Identifying hardware 11