Debug code led, Boot phases, Debug code led table – MSI MPG Z790 CARBON WIFI LGA 1700 ATX Motherboard User Manual
Page 52: Debug code led boot phases debug code led table, Sec progress codes, Sec error codes
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Debug Code LED
The Debug Code LED displays progress and error codes during and after POST. Refer
to the Debug Code LED table for details.
Boot Phases
Security (SEC)
– initial low-level initialization
Pre-EFI Initialization (PEI)
– memory initialization
Driver Execution Environment (DXE)
– main hardware initialization
Boot Device Selection (BDS)
– system setup, pre-OS user interface & selecting a
bootable device (CD/DVD, HDD, USB, Network, Shell, …)
Debug Code LED Table
SEC Progress Codes
01
Power on. Reset type detection (soft/hard)
02
AP initialization before microcode loading
03
System Agent initialization before microcode loading
04
PCH initialization before microcode loading
06
Microcode loading
07
AP initialization after microcode loading
08
System Agent initialization after microcode loading
09
PCH initialization after microcode loading
0B
Cache initialization
SEC Error Codes
0C - 0D
Reserved for future AMI SEC error codes
0E
Microcode not found
0F
Microcode not loaded
Hexadecimal Character Table
Hexadecimal
0
1
2
3
4
5
6
7
LED display
Hexadecimal
8
9
A
B
C
D
E
F
LED display