Table of Contents
Advertisement
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, ...)
Debug Code LED Table
SEC Progress Codes
01
02
03
04
06
07
08
09
0B
Downloaded from
ManualsNet.com
0
1
2
3
0 1 2 3 4 5 6 7 8 9 A B C D E F
Power on. Reset type detection (soft/hard)
AP initialization before microcode loading
System Agent initialization before microcode loading
PCH initialization before microcode loading
Microcode loading
AP initialization after microcode loading
System Agent initialization after microcode loading
PCH initialization after microcode loading
Cache initialization
search engine
Debug Code LED
4
5
6
7
8
9
A
B
C
D
Onboard LEDs
E
F
51
Advertisement
Table of Contents
