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System-board LEDs

The following illustration shows the light-emitting diodes (LEDs) on the system board.

Figure 1. System board LEDs
System board LEDs
Table 1. System board LEDs definition.

This is the system board LEDs definition table with two column headings. The first column is LED name. The second column the description for defining the LEDs.

LED nameDescription
Error LEDsWhen an error LED is lit, it indicates that the associated component has failed.
RTMM heartbeat LEDPower-on and power-off sequencing.
IMM 2 heartbeat LEDIndicates the status of the boot process of the IMM2.

When the server is connected to power this LED flashes quickly to indicate that the IMM2 code is loading. When the loading is complete, the LED stops flashing briefly and then flashes slowly to indicate that the IMM2 if fully operational and you can press the power-control button to start the server.

Standby power LEDWhen this LED is flashing, it indicates that the server is connected to an ac power source.

When this LED is lit, it indicates that the server is dc power on.

System board error LEDSystem-board has failed.
Microprocessor mismatch LEDWhen this LED is lit, it indicates that microprocessor 1 is not installed, or the microprocessors do not have the same cache size and type, and clock speed.
DIMM error LEDsA memory DIMM has failed or is incorrectly installed.
Microprocessor error LEDMicroprocessor has failed, is missing, or has been incorrectly installed.
Light path LEDIndicates whether or not the lightpath button is functional. If the light path LED is lit after pressing the lightpath button, it indicates that the lightpath button is functioning properly. By contrast, if the lightpath LED is not lit when pressing the light path button, it means the lightpath button is not functioning properly.