Firmware and RoT security module LEDs

The following illustration shows the light-emitting diodes (LEDs) on the Firmware and RoT security module (ThinkSystem V3 Firmware and Root of Trust 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	XCC heartbeat LED^note	Actions
RoT security module fatal firmware failure	Off	Off	On	N/A	Replace the firmware and RoT security module.
	Blink	N/A	On	N/A
	Blink	N/A	On	N/A
No system power	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 distribution board (PDB). If the PSU or PDB has any error, replace it. If there is no problem with the PSU or PDB, replace the system board.
XCC firmware recoverable error	Blink	N/A	Off	N/A	Information only. No action is required.
XCC firmware is recovered from error	On	N/A	Off	N/A
UEFI firmware authentication failure	N/A	Blink	Off	N/A
UEFI firmware is recovered from authentication failure	N/A	On	Off	N/A
System is OK	On	On	Off	On

Note

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

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