Left-side components
Item Component Function
(1) Vent Enables airflow to cool internal components.
NOTE: 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) USB ports (2) Connect optional USB devices.
(3) 1394 port Connects an optional IEEE 1394 or 1394a device, such as
a camcorder.
(4) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo
array microphone, or monaural microphone.
(5) Audio-out (headphone) jack Produces sound when connected to optional powered stereo
speakers, headphones, ear buds, a headset, or television
audio.
(6) ExpressCard slot Supports optional ExpressCards.
18 Chapter 2 External component identification
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