HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service Guide

Item Component Description
(2) DisplayPort Connects an optional digital display device such as a
high-performance monitor or projector.
(3) USB ports (3) Connect optional USB devices.
(4) Smart Card Reader (select models only) Supports optional smart cards and Java™ Cards.
(5) Audio-in (microphone) jack Connects an optional computer headset microphone,
stereo array microphone, or monaural microphone.
(6) 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.
28 Chapter 2 External component identification