Intel® Server Board S2600CW Family TPS Appendix E: POST Code Diagnostic LED Decoder
Revision 2.4
initialization of the IMC and other hardware settings, and initialization of applicable RAS
configurations.
When a major memory initialization error occurs and prevents the system from booting with
data integrity, a beep code is generated, the MRC will display a fatal error code on the
diagnostic 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 95. MRC Fatal Error Codes
Fatal Error Code Explanation (With MRC Internal Minor Code)
• 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.
Memory is locked by Intel® Trusted Execution Technology and is inaccessible.
DDR4 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)
• 01h = Software memtest failure
• 02h = Hardware on Receive Enable
• 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.
DIMM Configuration/Population Error
• 01h = Different DIMM types (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. 05h = Unsupported DIMM Voltage.
Indicates a CLTT table structure error
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