Figure 20. System-board LEDs 
Table 17.  System board LEDs
1  System error LED (yellow)
6  Processor 2 error LED
2  Identification LED (blue)
7  Processor 1 error LED
3  Light path power LED 8  DIMM 1-24 error LEDs
4  XCC heartbeat LED (Green)
9  Fan error LEDs
5  FPGA heartbeat LED (Green)
Processor and memory expansion tray LEDs
See this section to locate the LEDs on the processor and memory expansion tray.
Chapter 2. Server components 41