HP ENVY dv4-5213cl Notebook PC - Manual (Page 23)

Component Description
(5) Wireless module compartment Holds the wireless local area network (WLAN) device.
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. From the Start screen, type h, and then
select Help and Support.
(6) Hard drive bay and memory module
compartment The service door provides access to the hard drive bay
and memory module compartment.
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