Dell Latitude E5420 - Device Status Lights

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Dell Latitude 5420/E5420/E5420m
Owner's Manual
Diagnostics
Device Status Lights
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.
Turns on when a card with Bluetooth wireless technology is enabled. To
turn off only the Bluetooth wireless technology function, right-click the
icon in the system tray and select Disable Bluetooth Radio
If the computer is connected to an electrical outlet, the battery light operates as
follows:
Alternately blinking amber light
and blue light
An unauthenticated or unsupported non-Dell
AC adapter is attached to your laptop.
Alternately blinking amber light
with steady blue light
Temporary battery failure with AC adapter
present.
Constantly blinking amber light Fatal battery failure with AC adapter present.
Light off Battery in full charge mode with AC adapter
present.
Solid white light on Battery in charge mode with AC adapter
present.
The lights located above the keyboard indicate the following: