2–6 Maintenance and Service Guide
External component identification
Front components
Rear component
Item Component Description
(1) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo array 
microphone, or monaural microphone.
(2) Audio-out (headphone) jack Produces sound when connected to optional powered stereo speakers, 
headphones, ear buds, a headset, or television audio.
Component Description
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.
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