MSI MEG Z790 ACE MAX User Manual 1 - Page 61
Debug Code LED, Boot Phases, SEC Progress 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. Hexadecimal Character Table Hexadecimal 01234567 LED display Hexadecimal 8 9ABCDEF 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, ...) 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 61
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