External component identification
Front components
Item
Component
1
Power light
2
Battery light
3
Drive light
4
Audio-in (microphone) jack
5
Audio-out (headphone) jack
2–6
Description
—
On
The computer is on.
—
Flashing
The computer is in Sleep.
—
Off
The computer is off or in Hibernation.
—
On
The battery is charging.
—
Flashing
The battery reaches a low battery level or a critical battery level.
—
Off
If the computer is connected to an external power source, the light is off
when all batteries in the computer are fully charged. If the computer is not
connected to an external power source, the light is off until the battery
reaches a low battery level.
—
Flashing
The hard drive or the optical drive is being accessed.
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.
Maintenance and Service Guide