Firmware and RoT security module LEDs

The following illustrations show the light-emitting diodes (LEDs) on the Firmware and Root of Trust Security Module (firmware and RoT security module).

Figure 1. LEDs on the firmware and RoT security module

1 AP0 LED (Green) 2 AP1 LED (Green) 3 Fatal Error LED (Amber)

Table 1. LEDs description
Scenario	AP0 LED	AP1 LED	Fatal Error LED	FPGA heartbeat LED^note	XCC heartbeat LED^note	Actions
RoT security module fatal firmware failure	Off	Off	On	N/A	N/A	Replace the firmware and RoT security module.
	Blink	N/A	On	N/A	N/A	Replace the firmware and RoT security module.
	Blink	N/A	On	On	N/A	Replace the firmware and RoT security module.
No system power (FPGA heartbeat LED off)	Off	Off	Off	Off	Off	If the AC power is on, but the system board assembly does not have power, then: Check the power supply unit (PSU) or power backplane. If the PSU or power backplane has any error, replace it. If the PSU or power backplane is good, replace the system board.
XCC firmware recoverable error	Blink	N/A	Off	N/A	N/A	Information only. No action is required.
XCC firmware is recovered from error	On	N/A	Off	N/A	N/A	Information only. No action is required.
UEFI firmware authentication failure	N/A	Blink	Off	N/A	N/A	Information only. No action is required.
UEFI firmware is recovered from authentication failure	N/A	On	Off	N/A	N/A	Information only. No action is required.
System is OK (FPGA heartbeat LED is On)	On	On	Off	On	On	Information only. No action is required.

Note

For locations of the FPGA LED and XCC heartbeat LED, see System-board LEDs.

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