Preboot Blinking Power Button Codes - Dell Precision 7920 Owner's Manual

Preboot blinking power button codes

Table 20. Power button LED state
Power Button LED State
Off
Blinking Amber
Blinking White
Solid Amber
Solid White
Table 21. Diagnostic Indicator table
Power Light: Amber-White
Blinking
1-1
1-2
1-3
2-1
94 Troubleshooting
Amber/White Blinking Pattern
1 amber blink followed by a short
pause, 1 white blink, long pause,
then repeats
1 amber blink followed by a short
pause, 2 white blinks, long
pause, then repeats
1 amber blink followed by a short
pause, 3 white blinks, long
pause, then repeats
2 amber blinks followed by a
short pause, 1 white blink, long
pause, then repeats
Description
Power is Off. LED is blank.
Initial State of LED at power up. See the table below for Blinking
Amber pattern diagnostic suggestions and possible failures.
System is in a low power state, either S1 or S3. This does not
indicate a fault condition.
The second state of the LED at power up, indicates that the
POWER_GOOD signal is active and it is probable that the power
supply is fine.
System is in S0 state. This is the normal power states of a
functioning machine. The BIOS will turn the LED to this states to
indicate it has started fetching op-codes.
Problem Description
Faulty System board
Bad system board, Power
Supply or Power Supply cabling
Bad system board, Memory or
Processor
Bad Processor
Suggested Resolution
To troubleshoot the issue with
system board, contact Tech
support.
• If you can assist to
troubleshoot, narrow down
the issue with PSU BIST
Test, reseat cable.
• If nothing works, contact
Tech Support
• If you can assist to
troubleshoot, narrow down
the issue by reseating
memory and swapping a
known good memory if
available.
• If nothing works, contact
Tech Support
• CPU configuration activity is
in progress or a CPU failure
was detected.
• Contact Tech Support
• If you can assist to
troubleshoot, narrow down
the issue by ensuring CPU 0
is installed, CPU0 and CPU1
is an idendical matching pair
and swapping a known good
CPUs if available.