Front components
Item | Component | Description |
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1 | Power light | ■ On: The computer is on. |
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| ■ Blinking: The computer is in the Sleep state. |
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| ■ Off: The computer is off or in Hibernation. |
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2 | Battery light | ■ On: A battery is charging. |
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| ■ Blinking: A battery that is the only available power source has |
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| reached a low battery level. When the battery reaches a critical |
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| battery level, the battery light begins blinking rapidly. |
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| ■ Off: If the computer is plugged into an external power source, |
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| the light is turned off when all batteries in the computer are |
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| fully charged. If the computer is not plugged into an external |
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| power source, the light stays off until the battery reaches a low |
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| battery level. |
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3 | Drive light | Blinking: The hard drive or optical drive is being accessed. |
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4 | Connects an optional computer headset microphone, stereo array | |
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| microphone, or monaural microphone. |
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5 | Produces sound when connected to optional powered stereo | |
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| speakers, headphones, ear buds, a headset, or television audio. |
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Rear components
Component | Function |
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Vents (2) | Enable 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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External component identification |