Figure 5-2 Diagnostic LEDs
The pattern of illuminated LEDs can be used to identify the category of the fault or warning. For
example, if diagnostic LED one is red, there is a problem with memory. However, if diagnostic
LEDs one and two are both red, there is a problem with the server processor.
If the diagnostic LEDs indicate an error, check the EFI shell CLI cli>sl e to display the SEL
for a more detailed explanations of the failure.
• The server LED indicates the severity of the error. Check the server LED before proceeding
to analyze the sequence of diagnostic LEDs:
• System LED flashing YELLOW indicates a WARNING.
• System LED flashing RED indicates a FAULT.
• The diagnostic LEDs provide details about the specific error:
• Solid red indicates the failing part or subsystem.
• Off or solid green diagnostic LEDs provide additional details about the failure.
The faults and warnings fall into several general categories. See Table 5-4.
Table 5-4 Diagnostic LEDs Fault and Warning Categories
CategoryLED 4LED 3LED 2LED 1
MemoryAny
1
Any
1
Any
1
RED
FirmwareAny
1
Any
1
REDAny
1
System BoardAny
1
REDAny
1
Any
1
FanREDAny
1
Any
1
Any
1
ProcessorAny
1
Any
1
REDRED
BMCAny
1
REDAny
1
RED
TemperatureREDAny
1
Any
1
RED
Power SupplyREDAny
1
REDAny
1
UnknownREDREDREDRED
1 This LED can display any color other than red (for example, green or off).
Warnings
Table 5-5 through Table 5-12 provide additional information about each specific warning
associated with the various possible LED lighting sequences when the server LED is yellow.
104 Troubleshooting
