2–16 Maintenance and Service Guide
External component identification
Item Component Description
(1) Vent 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.
(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.
✎
When a device is connected to the headphone jack, the computer
speakers are disabled.
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