MSI MPG Z690 CARBON WIFI Manuel D'utilisation page 48

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.
Hexadecimal Character Table
Hexadecimal
Debug Code
LED display
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, ...)
36
Onboard LEDs
Debug Code LED
0 1 2 3 4
0 1 2 3 4 5 6 7 8 9 A B C D E F
5 6 7 8 9 A B C D E F