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Turns on when the computer reads from or writes to the hard drive.
Table 47. System diagnostic lights
Power button LED
Description
status
Off
Power is Off. LED is blank.
Blinking Amber
The Initial State of LED at power-up.
Solid Amber
The second state of the LED at power-up indicates that the POWER_GOOD signal is active and it is
likely that the power supply is fine.
Blinking White
The system is in a low power state, either S1 or S3. This does not indicate a fault condition.
Solid White
The system is in S0 state. This is the normal power states of a functioning machine.
Table 48. LED codes
Diagnostic light codes
Amber/White Blinking
Pattern
1,1
1,2
2,1
2,2
2,3
2,4
2,5
2,6
3,1
3,2
3,3
3,4
3,5
3,6
3,7
4,1
102
Troubleshooting
NOTE:
See the table below for Blinking Amber pattern diagnostic suggestions and possible failures.
Problem description
TPM detection failure
Unrecoverable SPI flash failure
CPU failure
Motherboard, covers BIOS corruption or
ROM error
No Memory/RAM detected
Memory/RAM failure
Invalid memory installed
Motherboard/chipset error
CMOS battery failure
PCI of Video card/chip failure
Recovery Image not found
Recovery Image found but invalid
EC ran into power sequencing failure
Flash corruption detected by SBIOS
Timeout waiting on ME to reply to HECI
message
Memory DIMM power rail failure
Recommended solutions
Replace the system board or the TPM chip.
Replace the system board.
Run the Intel CPU diagnostics tools. If problem
persists, 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.
Reset the memory module. If problem persists, replace
the memory module.
Reset the memory module. If problem persists, replace
the memory module.
Flash latest BIOS version. If problem persists, replace
the system board.
Reset the CMOS battery connection. If problem
persists, 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.
Run the PSU built-in self-test (BIST) to identify the
issue, reseat the cables. If nothing works, replace the
system board, power supply, or cabling.
Flash corruption detected by system BIOS. If problem
persists, replace the system board.
Timeout waiting on Management Engine to reply to
HECI message. If problem persists, replace the system
board.
Replace the system board.
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