Figure 369. LEDs on the Firmware and RoT Security Module
1 AP0 LED (Green) 2 AP1 LED (Green) 3 Fatal Error LED (Amber)
Table 172. LEDs description
Scenario
AP0
LED
AP1
LED
Fatal
Error
LED
FPGA
heart-
beat
LED
note
XCC
heart-
beat
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:
1. Check the power supply
unit (PSU) or power
interposer board (PIB) if
any. If the PSU or PIB has
any error, replace it.
2. If the PSU or PIB is good,
do the following:
a. Replace the system I/
O board.
b. Replace the processor
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
Blink
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.
Chapter 8. Problem determination 457
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