HP EliteBook 8770w Mobile Workstation - Manual (Page 26)

Component Description
(9) Speakers (2) Produce SRS Premium Sound or SRS Premium Sound
PRO (select models only).
NOTE: To use the SRS Premium Sound software,
from the Start screen, type SRS, and then select SRS
Premium Sound.
(10) Service door Provides access to the hard drive bay, the wireless
LAN (WLAN) module slot, the WWAN module slot, and
the memory module slots.
NOTE: 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.
From the Start screen, type h, and then select Help
and Support.
14 Chapter 2 Getting to know your computer