System diagnostic lights
Power-supply diagnostics light
Indicates the power-supply state.
Hard-drive activity light
Turns on when the computer reads from or writes to the hard drive.
Table 1. LED codesLED light codes for component issues/failure in the product.
Diagnostic light codes
|
Problem description
|
1,1
|
TPM detection failure
|
1,2
|
Unrecoverable SPI flash failure
|
2,1
|
CPU failure
|
2,2
|
Motherboard, covers BIOS corruption or ROM error
|
2,3
|
No Memory/RAM detected
|
2,4
|
Memory/RAM failure
|
2,5
|
Invalid memory installed
|
2,6
|
Motherboard/chipset error
|
3,1
|
CMOS battery failure
|
3,2
|
PCI of Video card/chip failure
|
3,3
|
Recovery Image not found
|
3,4
|
Recovery Image found but invalid
|
3,5
|
EC ran into power sequencing failure
|
3,6
|
Flash corruption detected by SBIOS
|
3,7
|
Timeout waiting on ME to reply to HECI message
|
4,1
|
Memory DIMM power rail failure
|
4,2
|
CPU power cable connection issue
|