The following illustrations show the light-emitting diodes (LEDs) on the system-board-assembly which contains the system I/O board and processor board.
Figure 1. System-board-assembly LEDs
1 System error LED (yellow)
2 System ID LED (blue)
3 XCC heartbeat LED (green)
4 PCH heartbeat LED (green)
5 FPGA heartbeat LED (green)
6 System status LED (green)
7 DIMM error LEDs (amber)
8 CPU1 error LED (amber)
9 CPU2 error LED (amber)
Table 1. System-board-assembly LEDs
LED
Description
Action
1 System error LED (yellow)
LED on: an error has occurred.
Check system logs or internal error LEDs to identify the failed part. For more information, see System error LED.
2 System ID LED (blue)
This LED helps you to visually locate the server.
A system ID button with LED is also located on the front of the server. You can press the system ID button to turn on/off or blink the front and rear ID LEDs.
3 XCC heartbeat LED (green)
The XCC heartbeat LED helps you identify the XCC status.
Blinking (about one flash per second) : XCC is working normally.
Blinking at other speeds or always on: XCC is at the initial phase or is working abnormally.
Off: XCC is not working.
If the XCC heartbeat LED is always off or always on, do the following:
If XCC cannot be access:
Re-plug the power cord.
Check and ensure that the system I/O board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.
(Trained technician only) Replace the firmware and RoT security module.
(Trained technician only) Replace the system I/O board.
If XCC can be access, replace the system I/O board.
If the XCC heartbeat LED is always blinking fast over 5 minutes, do the following:
Re-plug the power cord.
Check and ensure that the system I/O board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.
(Trained technician only) Replace the firmware and RoT security module.
(Trained technician only) Replace the system I/O board.
If the XCC heartbeat LED is always blinking slow over 5 minutes, do the following:
Re-plug the power cord.
Check and ensure that the system I/O board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.
If the problem remains, contact Lenovo Support.
4 PCH heartbeat LED (green)
The PCH heartbeat LED helps you identify the PCH status.
Blinking (about one flash per second): system ME is working normally.
Off: system ME is not working.
If the PCH heartbeat LED is always off or always on, do the following:
Check and ensure that the system I/O board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.
Make sure the UEFI firmware has been flashed to the corresponding platform version.
Update UEFI and XCC firmware to latest version.
Check if there is ME error event triggered in system event log. If yes, and the above actions are done, replace the firmware and RoT security module.
(Trained technician only) If it is still not working, replace the processor board.
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:
Replace the processor board.
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:
Re-plug the power cord.
Remove installed adapters/devices, one at a time, until you reach the minimal configuration for debugging.
(Trained technician only) If the problem remains, capture FFDC log, and replace the processor board.
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.
