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2-22 Chapter 2: Hardware information
3. Q-Code LEDs
The Q-Code LED design provides you the 2-digit display, allowing you to know
the system status. Refer to the Q-code table below for details.
Code Description
00
Not used
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
0A
Initialization after microcode loading
0B
Cache initialization
0C – 0D
Reserved for future AMI SEC error codes
0E
Microcode not found
0F
Microcode not loaded
10
PEI Core is started
11 – 14
Pre-memory CPU initialization is started
15 – 18
Pre-memory System Agent initialization is started
19 – 1C
Pre-memory PCH initialization is started
2B – 2F
Memory initialization
30
Reserved for ASL (see ASL Status Codes section below)
Q-Code table