Battery Status Lights - Dell Latitude E7440 Owner's Manual

Turns on steadily or blinks to indicate battery charge status.
Turns on when wireless networking is enabled.
The device status LEDs are usually located either on the top or left side of the keyboard. They are used to display the
storage, battery and wireless devices connectivity and activity. Apart from that they can be useful as a diagnostic tool
when there's a possible failure to the system.
The following table lists how to read the LED codes when possible errors occur.
Table 15. LED Lights
Storage LED Power LED
Blinking Solid
Solid Blinking
Blinking Blinking
Blinking Blinking
Blinking Blinking
Blinking Off
Solid Blinking
Blinking Solid
Off Blinking
Off Blinking

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 laptop.
blinking amber
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.
60
Wireless LED Fault Description
Solid A possible processor failure has occurred.
Solid The memory modules are detected but has encountered an
error.
Blinking A system board failure has occurred.
Solid A possible graphics card/video failure has occurred.
Off System failed on hard drive initialization OR System failed in
Option ROM initialization.
Blinking The USB controller encountered a problem during
initialization.
Blinking No memory modules are installed/detected.
Blinking The display encountered a problem during initialization.
Blinking The modem is preventing the system from completing POST
Off Memory failed to initialize or memory is unsupported.