Led_Sw1: Ez Led Control; Debug Code Led; Hexadecimal Character Table; Boot Phases - MSI MEG Z490 ACE Quick Start Manual

LED_SW1: EZ LED Control

This switch is used to switch on/ off all the LEDs of motherboard.

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 0
Debug Code
0 1 2 3 4 5 6 7 8 9 A B C D E F
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, ...)
LED_OFF
LED_SW1
Debug Code LED
1 2 3 4 5
LED_ON
(Default)
6 7 8 9 A B C D E F
Onboard LEDs
51