Intel ® Server System Sr1625Ur Service Guide; Figure 87. Diagnostic Led Placement Diagram; Table 9. Diagnostic Led Post Code Decoder - Intel SR1625UR - Server System - 0 MB RAM Service Manual

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
112
System Status LED
POST Code Diagnostic LEDs

Figure 87. 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 SR1625UR Service Guide
C
AF003045
Description