Technical Product Specification

Appendix B: POST Code LED Decoder Intel
®
Server System H2000WP Family TPS
Each POST code is represented by the eight amber diagnostic LEDs. The POST codes are
divided into two nibbles, an upper nibble and a lower nibble. The upper nibble bits are
represented by diagnostic LEDs #4, #5, #6, and #7. The lower nibble bits are represented by
diagnostics LEDs #0, #1, #2, and #3. If the bit is set in the upper and lower nibbles, then the
corresponding LED is lit. If the bit is clear, then the corresponding LED is off.
The diagnostic LED #7 is labeled as “MSB” (Most Significant Bit), and the diagnostic LED #0 is
labeled as “LSB” (Least Significant Bit).
In the following example, the BIOS sends a value of ACh to the diagnostic LED decoder. The
LEDs are decoded as follows:
Table 76. POST Progress Code LED Example
LEDs
Upper Nibble LEDs
Lower Nibble LEDs
MSB
LSB
LED #7
LED #6
LED #5
LED #4
LED #3
LED #2
LED #1
LED #0
8h
4h
2h
1h
8h
4h
2h
1h
Status
ON
OFF
ON
OFF
ON
ON
OFF
OFF
Results
1
0
1
0
1
1
0
0
Ah
Ch
Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are concatenated
as ACh.
Table 77. MRC Fatal Error Codes
Error Code
Fatal Error Code Explanation (with MRC Internal Minor Code)
0xE8
No Usable Memory Error:
01h = No memory was detected via 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.
03h = No memory installed. All channels are disabled.
0xE9
Memory is locked by Intel
®
Trusted Execution Technology and is inaccessible.
0xEA
DDR3 Channel Training Error:
01h = Error on read DQ/DQS (Data/Data Strobe) init
02h = Error on Receive Enable
03h = Error on Write Leveling
04h = Error on write DQ/DQS (Data/Data Strobe)
0xEB
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.
0xED
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 3rd DIMM slot can not be populated when QR DIMMs are installed.
04h = UDIMMs are not supported in the 3rd DIMM slot.
05h = Unsupported DIMM Voltage.
0xEF
Indicates a CLTT table structure error.
Revision 1.6 Intel order number: G52418-006 89