HP ProBook 6545b Maintenance And Service Manual page 32

External component identification
Item Component
(1) Vent
(2) DisplayPort
(3) USB ports (3)
(4) Smart Card Reader
(select models only)
(5) Audio-in (microphone) jack
(6) Audio-out (headphone) jack
2–16
Description
Enables airflow to cool internal components.
✎
The computer fan starts up automatically to cool internal components
and prevent overheating. It is normal for the internal fan to cycle on and
off during routine operation.
Connects an optional digital display device such as a high-performance
monitor or projector.
Connect optional USB devices.
Supports optional smart cards and Java™ Cards.
Connects an optional computer headset microphone, stereo array
microphone, or monaural microphone.
Produces sound when connected to optional powered stereo speakers,
headphones, ear buds, a headset, or television audio.
✎
When a device is connected to the headphone jack, the computer
speakers are disabled.
Maintenance and Service Guide