Figure 89. Diagnostic Led Placement Diagram; Table 9. Diagnostic Led Post Code Decoder - Intel SR1600UR - Server System - 0 MB RAM Service Manual
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A
B
A.
C.
Checkpoint
Upper Nibble
MSB
8h
LED
#7
Multi-Use Code (This beep code is used in different contexts)
0xF2h
O
Memory Error Codes (Accompanied by a beep code)
0xE8h
O
OxEAh
O
0xEBh
O
114
System Status LED
POST Code Diagnostic LEDs
Figure 89. Diagnostic LED Placement Diagram
Table 9. Diagnostic LED POST Code Decoder
Diagnostic LED Decoder
O=On; X=Off
4h
2h
1h
8h
#6
#5
#4
#3
O
O
O
X
O
O
X
O
O
O
X
O
O
O
X
O
B.
System Identification LED
Lower Nibble
LSB
4h
2h
1h
#2
#1
#0
Seen at the start of Memory Reference
Code (MRC)
Start of the very early platform
X
O
X
initialization code
Very late in POST, it is the signal that the
OS has switched to virtual memory
mode
X
X
X
No Usable Memory Error: No memory in
the system, or SPD bad so no memory
could be detected
X
O
X
Channel Training Error: DQ/DQS
training failed on a channel during
memory channel initialization.
X
O
O
Memory Test Error: memory failed
Hardware BIST.
®
Intel
Server System SR1600UR Service Guide
C
AF003045
Description
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