HP ProBook 6555b Notebook-PC - Manual (Page 25)

Component Description
(6) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo array
microphone, or monaural microphone.
(7) Audio-out (headphone) jack Produces sound when connected to optional powered stereo
speakers, headphones, ear buds, a headset, or television audio.
NOTE: When a device is connected to the headphone jack, the
computer speakers are disabled.
Rear components
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) RJ-45 (network) jack Connects a network cable.
(2) External monitor port Connects an external VGA monitor or projector.
(3) Power connector Connects an AC adapter.
Component Description
(1) Security cable slot 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.
(2) RJ-11 (modem) jack Connects a modem cable.
(3) RJ-45 (network) jack Connects a network cable.
(4) External monitor port Connects an external VGA monitor or projector.
(5) Power connector Connects an AC adapter.
Identifying hardware 15