37
Onboard LEDs
Hexadecimal Character Table
Hexadecimal 0 1 2 3 4 5 6 7 8 9 A B D E F
LED display
0 1 2 3 4 5 6 7 8 9 A B C D E F
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)
Debug Code LED Table
SEC Progress Codes
01
02 AP initialization before microcode loading
03 System Agent initialization before microcode loading
04
06 Microcode loading
07 AP initialization after microcode loading
08 System Agent initialization after microcode loading
09
0B
SEC Error Codes
0C - 0D
0E Microcode not found
0F Microcode not loaded
PEI Progress Codes
10
11
12 - 14
15 Pre-memory System Agent initialization is started
16 - 18
19
1A - 1C
2B
2C Memory initialization. Memory presence detection
2D Memory initialization. Programming memory timing information
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