Right - HP ProBook 450 G2 Maintenance And Service Manual

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Component
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16 Chapter 2 External component identification
Audio-out (headphone)/Audio-in (microphone)
jack
USB 2.0 ports (2)
Optical drive (select models only)
Optical drive eject button (select models only)
Security cable slot
Description
Connects optional powered stereo speakers, headphones,
earbuds, or a headset. Also connects an optional headset
microphone. This jack does not support optional microphone-
only devices.
WARNING! To reduce the risk of personal injury, adjust the
volume before putting on headphones, earbuds, or a headset.
For additional safety information, see the Regulatory, Safety,
and Environmental Notices. To access this guide in Windows
8.1 , from the Start screen, type support, and then select the
HP Support Assistant app. To access the user guides in
Windows 7, select Start > Help and Support > User Guides.
NOTE: When a device is connected to the jack, the computer
speakers are disabled.
NOTE: Be sure that the device cable has a 4-conductor
connector that supports both audio-out (headphone) and
audio-in (microphone).
Connects an optional USB device, such as a keyboard, mouse,
external drive, printer, scanner or USB hub.
Depending on your computer model, reads an optical disc or
reads and writes to an optical disc.
Releases the optical drive disc tray.
Attaches an optional security cable to the computer.
NOTE: The security cable is designed to act as a deterrent, but
it may not prevent the computer from being mishandled or
stolen.