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System-board LEDs

The following illustrations show the light-emitting diodes (LEDs) on the system board.

Press the power button to light the LEDs on the system board when the power source has been removed from the server.

Figure 1. System-board LEDs
System-board LEDs
Table 1. System-board-assembly LEDs
LEDDescriptionAction
1 System power LED (green)The system power LED helps you determine the system power status.

The states of the system power LED are as follows:

  • Off: No power supply is properly installed, or the LED itself has failed.

  • Flashing rapidly (four times per second): The server is turned off and is not ready to be turned on. The power button is disabled. This will last approximately 5 to 10 seconds.

  • Flashing slowly (once per second): The server is turned off and is ready to be turned on. Press the power button to turn on the server.

  • On: The server is turned on.

2 Drive activity LED (green)This LED indicates the activity of the drives.

  • Blinking: The drives are active.

  • Off: The drives are not active.

N/A
3 Network activity LED (green)The network activity LED helps you identify the network connectivity and activity.

  • Blinking: The network is connected and active.

  • Off: The server is disconnected from the network.

N/A
4 System error LED (yellow)The system error LED helps you determine if there are any system errors.

  • On: An error has been detected on the server.

  • Off: The server is off or the server is on and is working correctly.

Check system logs or internal error LEDs to identify the failed part. For more information, see System error LED.
5 FPGA heartbeat LEDThe 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 the FPGA heartbeat LED is always off or always on, do the following:

  1. Replace the system board.

  2. If the problem remains, contact Lenovo Support.

6 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 accessed:

      1. Re-plug the power cord.

      2. Check and ensure that the system board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.

      3. (Trained technician only) Replace the firmware and RoT security module.

      4. (Trained technician only) Replace the system board.

    • If XCC can be accessed, replace the system board.

  • If the XCC heartbeat LED is always blinking fast over 5 minutes, do the following:

    1. Re-plug the power cord.

    2. Check and ensure that the system board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.

    3. (Trained technician only) Replace the firmware and RoT security module.

    4. (Trained technician only) Replace the system board.

  • If the XCC heartbeat LED is always blinking slow over 5 minutes, do the following:

    1. Re-plug the power cord.

    2. Check and ensure that the system board and the firmware and RoT security module are installed correctly. (Trained technician only) Reinstall them if needed.

    3. If the problem remains, contact Lenovo Support.