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Diagnostic LED
This section details the diagnostic features of the battery LED in a notebook.
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 amber, 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
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 17. LED pattern
Blinking pattern
Problem Description
Amber White
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
Real Time Clock reset
The Real Time Clock (RTC) reset function allows you to recover your Dell system from No POST/No Boot/No Power situations. To initiate
the RTC reset on the system make sure system is in a power-off state and is connected to power source . Press and hold the power button
for 25 seconds and then release the power button. Go to
NOTE:
If AC power is disconnected from the system during the process or the power button is held longer than 40 seconds, the
RTC reset process is aborted.
The RTC reset will reset the BIOS to Defaults, un-provision Intel vPro and reset the system date and time. The following items are
unaffected by the RTC reset:
•
Service Tag
•
Asset Tag
•
Ownership Tag
•
Admin Password
•
System Password
•
HDD Password
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
how to reset real time
clock.
Solución de problemas
69
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