Q-Code Leds - Asus X99-A User Manual

5.

Q-Code LEDs

The Q-Code LED design provides you with a 2-digit error code that displays the system
status. Refer to the Q-Code table on the next page for details.
Q-Code table
Code Description
Not used
00
microcode
02
CACHE_ENABLED
03
PCH initialization
04
CPU_EARLY_INIT
06
PEI Core is started
10
Pre-memory CPU initialization is started
11 – 14
Pre-memory System Agent initialization is started
15 – 18
Pre-memory PCH initialization is started
19 – 1C
Memory initialization
2B – 2F
Reserved for ASL (see ASL Status Codes section below)
30
Memory Installed
31
CPU post-memory initialization
32 – 36
Post-Memory System Agent initialization is started
37 – 3A
Post-Memory PCH initialization is started
3B – 3E
DXE IPL is started
4F
Memory initialization error. Invalid memory type or incompatible memory
50 – 53
speed
DXE IPL is started
4F
Unspecified memory initialization error
54
Memory not installed
55
Invalid CPU type or Speed
56
CPU mismatch
57
CPU self test failed or possible CPU cache error
58
ASUS X99-A
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