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Dell Latitude 3540 Owner's Manual

PDF

Device Status Lights

IconDescription
power button lightTurns on when you turn on the computer and blinks when the computer is in a power management mode.
Hard drive activity lightTurns on when the computer reads or writes data.
Battery charge lightTurns on steadily or blinks to indicate battery charge status.
WiFi indicatorTurns on when wireless networking is enabled.

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