Device Status Lights; Battery Status Lights - Dell Latitude E5540 Owner's Manual

Device Status Lights

Icon Description
Turns on when you turn on the computer and blinks when the computer is in a power
management mode.
Turns on when the computer reads or writes data.
Turns on steadily or blinks to indicate battery charge status.
Turns on when wireless networking is enabled.

Battery Status Lights

If the computer is connected to an electrical outlet, the battery light operates as follows:
Alternately An unauthenticated or unsupported non-Dell AC adapter is attached to your
blinking amber laptop.
light and white
light
Alternately Temporary battery failure with AC adapter present.
blinking amber
light with
steady white
light
Constantly Fatal battery failure with AC adapter present.
blinking amber
light
Light off Battery in full charge mode with AC adapter present.
White light on Battery in charge mode with AC adapter present.
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