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Error Reporting and Handling
Intel® Server Board X38ML
Revision 1.3
Intel order number E15331-006
98
Since the red bits correspond to the upper nibble and the green bits correspond to the lower
nibble, the two are concatenated to be ACh.
Table 48. POST Progress Code LED Example
8h
4h
2h
1h
LEDs
Red
Green
Red
Green
Red
Green
Red
Green
Ach
1 1 0 1 1 0 0 0
Result Amber
Green
Red
Off
MSB
LSB
Figure 27. Location of Diagnostic LEDs on the Intel
®
Server Board X38ML
6.3.2
POST Code Checkpoints
Table 49. POST Code Checkpoints
Diagnostic LED Decoder
G=Green, R=Red, A=Amber
Checkpoint
MSB
LSB
Description
Host Processor
0x10h OFF OFF
OFF R Power-on
initialization of the host processor (bootstrap processor)
0x11h OFF OFF
OFF A Host
processor
cache initialization (including AP)
0x12h OFF OFF G R Starting
application processor initialization
0x13h OFF OFF G A SMM
initialization
Chipset
0x21h
OFF
OFF
R
G
Initializing a chipset component
Memory
0x22h OFF
OFF
A
OFF
Reading
configuration data from memory (SPD on FBDIMM)
0x23h
OFF
OFF
A
G
Detecting presence of memory
0x24h
OFF
G
R
OFF Programming timing parameters in the memory controller
0x25h
OFF
G
R
G
Configuring memory parameters in the memory controller
0x26h OFF G A
OFF
Optimizing
memory controller settings
0x27h OFF G A G
Initializing
memory, such as ECC init
0x28h G
OFF
R
OFF
Testing
memory
PCI Bus
0x50h
OFF
R
OFF
R
Enumerating PCI busses
0x51h
OFF
R
OFF
A
Allocating resources to PCI busses
0x52h
OFF
R
G
R
Hot-Plug PCI controller initialization
0x53h
OFF
R
G
A
Reserved for PCI bus
LSB
MSB
Diagnostic LEDs
Right edge of board
PCI Express* x16