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NOTE:
Dell SupportAssist Pre-boot diagnostics upon launch, initiates an LCD BIST first, expecting a user intervention
confirm functionality of the LCD.
Diagnostic LED
This section details the diagnostic features of the battery LED.
Instead of beep codes, errors are indicated via the bicolor Battery Charge/Status LED. A specific blink pattern is followed by
flashing a pattern of flashes in amber, followed by white. The pattern then repeats.
NOTE:
he diagnostic pattern will consist of a two digit number being represented by a first group of LED blinks (1 through
9) in amber, 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 three 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 Notebooks, battery codes for Low
Battery or Battery Failure situations will not be displayed when Diagnostic Error Codes are being displayed.
Table 18. Diagnostic LED
Blinking Pattern
Amber
White
2
1
2
2
2
3
2
4
2
5
2
6
2
7
3
1
3
2
3
3
3
4
Recovering the operating system
When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
122
Troubleshooting
Possible Problem
CPU failure
System Board failure (included BIOS corruption or ROM
error)
No Memory/ RAM detected
Memory / RAM failure
Invalid memory installed
System board / Chipset Error / Clock failure / Gate A20
failure / Super I/O failure / Keyboard controller failure
LCD failure
RTC power failure
PCI or Video card/chip failure
BIOS Recovery image not found
BIOS Recovery image found but invalid
Suggested Resolution
Replace the system board
Flash latest BIOS version.
If problem persists, replace
the system board
Confirm that the memory
module is installed
properly. If problem
persists, replace the
memory module
Replace the memory
module
Replace the memory
module
Replace the system board
Replace the LCD
Replace the CMOS battery
Replace the system board
Flash latest BIOS version.
If problem persists, replace
the system board
Flash latest BIOS version.
If problem persists, replace
the system board
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