Dell Precision 7920 Tower Owners Manual - Page 122

Preboot blinking power button codes

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Preboot blinking power button codes Table 20. Power button LED state Power Button LED State Off Blinking Amber Blinking White Solid Amber Solid White 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. Table 21. Diagnostic Indicator table Power Light: Amber-White Blinking Amber/White Blinking Pattern Problem Description 1-1 1 amber blink followed by a short Faulty System board pause, 1 white blink, long pause, then repeats Suggested Resolution To troubleshoot the issue with system board, contact Tech support. 1-2 1 amber blink followed by a short Bad system board, Power • If you can assist to pause, 2 white blinks, long Supply or Power Supply cabling troubleshoot, narrow down pause, then repeats the issue with PSU BIST Test, reseat cable. • If nothing works, contact Tech Support 1-3 1 amber blink followed by a short Bad system board, Memory or • If you can assist to pause, 3 white blinks, long Processor troubleshoot, narrow down pause, then repeats the issue by reseating memory and swapping a known good memory if available. • If nothing works, contact Tech Support 2-1 2 amber blinks followed by a Bad Processor • CPU configuration activity is short pause, 1 white blink, long in progress or a CPU failure pause, then repeats 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. • If nothing works, contact Tech Support 2-2 2 amber blinks followed by a Motherboard: BIOS ROM failure • System is in Recovery short pause, 2 white blinks, long Mode. pause, then repeats 122 Troubleshooting

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Preboot blinking power button codes
Table 20. Power button LED state
Power Button LED State
Description
Off
Power is Off. LED is blank.
Blinking Amber
Initial State of LED at power up. See the table below for Blinking
Amber pattern diagnostic suggestions and possible failures.
Blinking White
System is in a low power state, either S1 or S3. This does not
indicate a fault condition.
Solid Amber
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.
Solid White
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.
Table 21. Diagnostic Indicator table
Power Light: Amber-White
Blinking
Amber/White Blinking
Pattern
Problem Description
Suggested Resolution
1-1
1 amber blink followed by a short
pause, 1 white blink, long pause,
then repeats
Faulty System board
To troubleshoot the issue with
system board, contact Tech
support.
1-2
1 amber blink followed by a short
pause, 2 white blinks, long
pause, then repeats
Bad system board, Power
Supply or Power Supply cabling
•
If you can assist to
troubleshoot, narrow down
the issue with PSU BIST
Test, reseat cable.
•
If nothing works, contact
Tech Support
1-3
1 amber blink followed by a short
pause, 3 white blinks, long
pause, then repeats
Bad system board, Memory or
Processor
•
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
2-1
2 amber blinks followed by a
short pause, 1 white blink, long
pause, then repeats
Bad Processor
•
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.
•
If nothing works, contact
Tech Support
2-2
2 amber blinks followed by a
short pause, 2 white blinks, long
pause, then repeats
Motherboard: BIOS ROM failure
•
System is in Recovery
Mode.
122
Troubleshooting