Battery Status Lights; Diagnostic Led - Dell Latitude 5424 Rugged Owner's Manual

NOTE: Dell ePSA upon launch, initiates a LCD BIST first, expecting an user intervention confirm functionality of the LCD.

Battery Status Lights

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

Diagnostic LED

This section details the diagnostic features of the battery LED in a laptop.
Instead of beep codes errors are indicated via the bicolor Battery Charge LED. A specific blink pattern is followed by flashing a pattern of
flashes in green, followed by white. The pattern then repeats.
NOTE: The diagnostic pattern will consist of a two digit number being represented by a first group of LED blinks (1 through 9) in
green, followed by a 1.5 second pause with the LED off, and then a second group of LED blinks (1 through 9) in white. This is
then followed by a 3 second pause, with the LED off, before repeating over again. Each LED blink takes 0.5 seconds.
The system will not shutdown when displaying the Diagnostic Error Codes. Diagnostic Error Codes will always supersede any other use of
the LED. For instance, on laptops, battery codes for Low Battery or Battery Failure situations will not be displayed when Diagnostic Error
Codes are being displayed:
Table 73. LED pattern
Blinking pattern
Green
2
2
2
2
2
2
2
3
3
3
White
1
2
3
4
5
6
7
1
2
3
Problem Description
processor
system board, BIOS ROM
memory
memory
memory
system board; chipset
display
RTC power failure
PCI/Video
BIOS recovery 1
Suggested Resolution
Processor failure
System board, covers BIOS
corruption or ROM error
No memory/no RAM
detected
Memory failure/RAM failure
Invalid memory installed
System board/ chipset error
Display failure
Coin-cell battery failure
PCI/Video card/chip failure
Recovery image not found
Diagnostics 205