Datasheet

Intel
®
Server Board S2400GP TPS Appendix C: POST Code Diagnostic LED Decoder
Revision 1.01
Intel order number G50295-002
133
LEDs, and a system halt command is executed. Fatal MRC error halts do NOT change the state
of the System Status LED, and they do NOT get logged as SEL events. The following table lists
all MRC fatal errors that are displayed to the Diagnostic LEDs.
Table 54. POST Progress LED Codes
Checkpoint
Diagnostic LED Decoder
Description
1 = LED On, 0 = LED Off
Upper Nibble
Lower Nibble
MSB
LSB
8h
4h
2h
1h
8h
4h
2h
1h
LED
#7
#6
#5
#4
#3
#2
#1
#0
MRC Fatal Error Codes
E8h
1
1
1
0
1
0
0
0
No usable memory error
01h = No memory was detected through SPD read, or invalid config that
causes no operable memory.
02h = Memory DIMMs on all channels of all sockets are disabled due to
hardware memtest error.
3h = No memory installed. All channels are disabled.
E9h
1
1
1
0
1
0
0
1
Memory is locked by Intel
®
Trusted Execution Technology and is
inaccessible
EAh
1
1
1
0
1
0
1
0
DDR3 channel training error
01h = Error on read DQ/DQS (Data/Data Strobe) init
02h = Error on Receive Enable
3h = Error on Write Leveling
04h = Error on write DQ/DQS (Data/Data Strobe
EBh
1
1
1
0
1
0
1
1
Memory test failure
01h = Software memtest failure.
02h = Hardware memtest failed.
03h = Hardware Memtest failure in Lockstep Channel mode requiring a
channel to be disabled. This is a fatal error which requires a reset and
calling MRC with a different RAS mode to retry.
EDh
1
1
1
0
1
1
0
1
DIMM configuration population error
01h = Different DIMM types (UDIMM, RDIMM, LRDIMM) are detected
installed in the system.
02h = Violation of DIMM population rules.
03h = The third DIMM slot cannot be populated when QR DIMMs are
installed.
04h = UDIMMs are not supported in the third DIMM slot.
05h = Unsupported DIMM Voltage.
EFh
1
1
1
0
1
1
1
1
Indicates a CLTT table structure error