Light path diagnostics LEDs

Use this information to diagnose possible errors that are indicated by the light path diagnostics LEDs.

The following table describes the LEDs on the light path diagnostics panel and the light path diagnostics LEDs on the system board. LEDs on the light path card are visible from the top of the compute node. See Viewing the light path diagnostics LEDs for information about lighting the LEDs.

Lit light path diagnostics LED	Description
Light path diagnostics	This LED lights when the light path LED card is installed
Memory	The IMM2 lights this LED, the corresponding DIMM error LEDs on the system board and the fault LED when a memory fault has occurred.
Mismatch	The IMM2 lights this LED and the fault LED when a mismatch has occurred between the processors, DIMMs, or hard disk drives within the configuration as reported by POST.
NMI	The IMM2 lights this LED and the fault LED when an nonmaskable interrupt (NMI) occurs.
Spare	Reserved for future use
System board	The IMM2 lights this LED and the fault LED when a system board error has been detected.
Temperature	The IMM lights this LED and the fault LED when an over-temperature condition has occurred that was critical enough to shut down the compute node.

Table 1. Light path LED errors

Light path diagnostics LED	Description	Action
None	An error has occurred and cannot be isolated, or the IMM2 has failed.	Make sure that the light path diagnostics LED is lit to ensure that there is enough power in the compute node to light the rest of the LEDs.
Battery error	The battery failed.	Reseat the battery. Replace the battery. (Trained service technician only) Replace the base assembly.
DIMM x error	A memory error occurred.	Make sure that the DIMM that is indicated by the lit LED is supported. Reseat the DIMM that is indicated by the lit LED. Replace the DIMM that is indicated by the lit LED (see Removing a DIMM, and Installing a DIMM) Note Multiple DIMM LEDs do not necessarily indicate multiple DIMM failures. If more than one DIMM LED is lit, reseat or replace one DIMM at a time until the error is corrected (see Removing a DIMM, and Installing a DIMM)
Light path diagnostics LED	System board light path diagnostics LEDs have power.	Check for error LEDs that are lit on the system board.
Microprocessor x error	The microprocessor has failed, or overheated, or the boot microprocessor is missing.	Check the CMM log for more information. Perform the appropriate action. If the log shows that a microprocessor is disabled or that a microprocessor IERR has occurred, perform the appropriate action. (Trained service technician only) Reset the microprocessor that is indicated by the lit LED. (Trained service technician only) Replace the microprocessor that is indicated by the lit LED.
Microprocessor mismatch	The microprocessors do not match.	Make sure that all installed microprocessors are identical (number of cores, cache size, type, clock speed, and internal / external clock frequencies).
NMI	The system board failed.	Reinsert the compute node, and then restart the compute node. Check the IMM event log for information about the error. (Trained service technician only) Replace the base assembly.
System board	The system board failed.	(Trained service technician only) Replace the base assembly.
Temperature	The system temperature has exceeded the threshold level	Check the function of the shared compute node and chassis unit resources. Make sure that the room temperature is not too high.
Hard disk drive	A hard disk drive failed.	Run the fixed disk or attached disk diagnostic test. If the drive passes the test but continues to have a problem replace the hard disk drive (see Removing a hot-swap hard disk drive and Installing a hot-swap hard disk drive)..
Adapter fault	An adapter failed.	Run the adapter card diagnostics test. If adapter passes the test but continues to have a problem, replace the adapter.

Table 2. System board diagnostic LED information

LED	Color	LED name	Description
D9001 D9004	Green	Checkpoint LEDs (MSD)	These LEDs represent checkpoint display codes in binary.
D9005 D9008	Green	Checkpoint LEDs (LSD)	These LEDs represent checkpoint display codes in binary.
D9009	Green	FPGA heartbeat	This LED will light when there is activity on the FPGA.
DVL01	Yellow	Battery error	The IMM2 lights this LED and the fault LED when the battery is defective.
DBL01	Yellow	IMM fault	The IMM2 lights this LED and the fault LED when a problem has been detected with the IMM2.
DPL00	Yellow	CPU 1 error	The IMM2 lights this LED and the fault LED when microprocessor 1 is defective or when no processor is installed in the microprocessor 1 socket.
DPL01	Yellow	CPU 2 error	The IMM2 lights this LED and the fault LED when microprocessor 2 is defective.
DPL02	Yellow	CPU 3 error	The IMM2 lights this LED and the fault LED when microprocessor 3 is defective.
DPL03	Yellow	CPU 4 error	The IMM2 lights this LED and the fault LED when microprocessor 4 is defective.
DVL02	Yellow	DC fault	The IMM2 lights this LED and the fault LED when there is a power fault on one of the power rails.
DML01 DML48	Yellow	DIMM x error	The IMM2 lights any of these LEDs and the fault LED when any DIMMs 1 – 48 are defective.
DLLACT10	Green	Ethernet 1-0 activity	This LED lights when there is Ethernet activity on port 0 of LOM controller 1.
DLLACT11	Green	Ethernet 1-1 activity	This LED lights when there is Ethernet activity on port 1 of LOM controller 1.
DLLACT20	Green	Ethernet 2-0 activity	This LED lights when there is Ethernet activity on port 0 of LOM controller 2.
DLLACT21	Green	Ethernet 2-1 activity	This LED lights when there is Ethernet activity on port 1 of LOM controller 2.
DLLUP10	Green	Ethernet 1-0 link	This LED lights when port 0 on LOM controller 1 is connected to the network.
DLLUP11	Green	Ethernet 1-1 link	This LED lights when port 1 on LOM controller 1 is connected to the network.
DLLUP20	Green	Ethernet 2-0 link	This LED lights when port 0 on LOM controller 2 is connected to the network.
DLLUP21	Green	Ethernet 2-1 link	This LED lights when port 1 on LOM controller 2 is connected to the network.
DLPWROK1	Green	Ethernet 1 power OK	This LED lights when power to LOM controller 1 is on and working properly.
DLPWROK2	Green	Ethernet 2 power OK	This LED lights when power to LOM controller 2 is on and working properly.
DPWRFAULT	Yellow	Power fault	This LED lights when there is an overcurrent fault on one of the 12 V power rails.
DS862	Green	RTMM heartbeat	This LED lights when there is activity on the RTMM.
DS913	Green	IMM heartbeat	This LED lights when there is activity on the IMM2.
DSL01	Yellow	SAS back plane 1 error	The IMM lights this LED and the fault LED when there is a problem with SAS backplane 1.
DSL02	Yellow	SAS Back Plane 2 error	The IMM2 light this LED and the fault LED when there is a problem with SAS backplane 2.
DSAS_LF10	Yellow	SAS 1-0 link failure	The IMM lights this LED and the fault LED when there is a fault with the link between the SAS controller and SAS Port 0 on SAS backplane 1.
DSAS_LF11	Yellow	SAS 1-1 link failure	The IMM lights this LED and the fault LED when there is a fault with the link between the SAS controller and SAS Port 1 on SAS backplane 1.
DSAS_LF20	Yellow	SAS 2-0 link failure	The IMM2 lights this LED when there is a fault with the link between the SAS controller and SAS port 0 on SAS backplane 2.
DSAS_LF21	Yellow	SAS 2-1 link failure	The IMM2 lights this LED when there is a fault with the link between the SAS controller and SAS port 1 on SAS backplane 2.
DSERROR	Yellow	SAS error	This LED lights when there is a problem with the LSI2004 SAS controller.
DSHB	Green	SAS heartbeat	This LED lights when there is activity on the LSI2004 SAS controller.