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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 and behaviors.
LEDBehaviors & descriptions
1 XCC image invalid LED (yellow)

  • On: XCC image security check failed.

  • Off: XCC image security check passed

2 FPGA image valid LED (green)

  • On: FPGA image security check passed.

  • Off: FPGA image security check failed.

3 SEP heartbeat LED (green)

  • Blinking: SEP is functioning.

  • On: SEP is malfunctioning.

  • Off: SEP is malfunctioning.

4 ME heartbeat LED (green)

  • Blinking: PCH ME is functioning.

  • On: PCH ME is malfunctioning.

  • Off: PCH ME is malfunctioning.

5 XCC heartbeat LED (green)

  • Blinking slowly: XCC is functioning.

  • Blinking rapidly and constantly: XCC is malfunctioning.

  • On: XCC is malfunctioning.

  • Off: XCC is malfunctioning.

6 UEFI image valid LED (green)

  • On: UEFI flash contents security check passed.

  • Off: UEFI flash contents security check failed.

7 Network activity LED (green, visible from front view)

  • Blinking: There are on-going network activities.

  • On: Network is established, while there is no activity.

  • Off: There is no established network.