Table 34. System-board-assembly LEDs (continued)
LED
Description
Action
5 FPGA heartbeat
LED (green)
The FPGA heartbeat LED helps
you identify the FPGA status.
• Blinking (about one flash per
second): FPGA is working
normally.
• On or off: FPGA is not
working.
If FPGA heartbeat LED is always off or always on, do the
following:
1. Replace the processor board.
2. If the problem remains, contact Lenovo Support.
6 System status
LED (green)
The system status LED indicates
the working status of the system.
• Fast blinking (about four
flashes per second): Power
fault or is waiting for XCC
power permission ready.
• Slow blinking (about one flash
per second): Power off and is
ready to be powered on
(standby state).
• ON: Power on
• If the system status LED is blinking fast over 5 minutes
and cannot power on, check the XCC heartbeat LED
and follow the
actions for the XCC heartbeat LED.
• If the system status LED remains off or is blinking fast
(about four flashes per second) and the system error
LED on the front panel is on (yellow), the system is in a
power fault status. Do the following:
1. Re-plug the power cord.
2. Remove installed adapters/devices, one at a time,
until you reach the minimal configuration for
debugging.
3. (Trained technician only) If the problem remains,
capture FFDC log, and replace the processor
board.
4. If the problem still remains, contact Lenovo
Support.
7 DIMM error LEDs
(Amber)
LED on: an error has occurred to
the DIMM the LED represents.
For more information, see
“Memory problems” on page
481
.
LEDs on the Firmware and RoT Security Module
The following illustrations show the light-emitting diodes (LEDs) on the ThinkSystem V3 Firmware and Root
of Trust Security Module (firmware and RoT security module).
Figure 479. LEDs on the firmware and RoT security module
1 AP0 LED (Green) 2 AP1 LED (Green) 3 Fatal Error LED (Amber)
Chapter 8. Problem determination 473
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