Dell Precision 5520 Owners Manual - Page 34

Diagnostic LED

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Light off White light on Battery in full charge mode with AC adapter present. Battery in charge mode with AC adapter present. Diagnostic LED Occasionally the computer may indicate bicolor flashes on Battery Charge LED. A specific blink pattern, flashing a pattern of amber, followed by white, and then the same pattern repeats. NOTE: The diagnostic pattern consists of a two-digit number that is represented by a first group of amber LED blinks (1 through 9), followed by a 1.5-second pause with the LED off, and then a second group of LED blinks (1 through 9) in white. Followed by a three-second pause, with the LED off, before repeating over again. Each LED blink takes 0.5 s. The system does not shut down when displaying the Diagnostic Error Codes. Diagnostic Error Codes supersedes any other use of the LED. For instance, on laptops, battery codes for Low Battery or Battery Failure situations are not displayed when the Diagnostic Error Codes are being displayed: Table 4. LED pattern Blinking pattern Problem Description Ambe White r 2 1 processor 2 2 system board, BIOS ROM 2 3 memory 2 4 memory 2 5 memory 2 6 system board; chipset 2 7 display 3 1 RTC power failure 3 2 PCI/Video 3 3 BIOS recovery 1 3 4 BIOS recovery 2 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 nor found recovery image found but invalid 34 Diagnostics

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Light off
Battery in full charge mode with AC adapter present.
White light on
Battery in charge mode with AC adapter present.
Diagnostic LED
Occasionally the computer may indicate bicolor flashes on Battery Charge LED. A specific blink pattern, flashing a pattern of amber,
followed by white, and then the same pattern repeats.
NOTE:
The diagnostic pattern consists of a two-digit number that is represented by a first group of amber LED blinks (1
through 9), followed by a 1.5-second pause with the LED off, and then a second group of LED blinks (1 through 9) in
white. Followed by a three-second pause, with the LED off, before repeating over again. Each LED blink takes 0.5 s.
The system does not shut down when displaying the Diagnostic Error Codes. Diagnostic Error Codes supersedes any other use of the
LED. For instance, on laptops, battery codes for Low Battery or Battery Failure situations are not displayed when the Diagnostic Error
Codes are being displayed:
Table 4. LED pattern
Blinking pattern
Problem Description
Suggested Resolution
Ambe
r
White
2
1
processor
processor failure
2
2
system board, BIOS ROM
system board, covers BIOS corruption or ROM error
2
3
memory
no memory/no RAM detected
2
4
memory
memory failure/RAM failure
2
5
memory
invalid memory installed
2
6
system board; chipset
system board/ chipset error
2
7
display
display failure
3
1
RTC power failure
coin-cell battery failure
3
2
PCI/Video
PCI/Video card/chip failure
3
3
BIOS recovery 1
recovery image nor found
3
4
BIOS recovery 2
recovery image found but invalid
34
Diagnostics