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System I/O board LEDs

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

Figure 1. System I/O board LEDs
System I/O board LEDs
Table 1. System I/O board LEDs
LEDDescriptionAction
1 System error LED (yellow)LED on: an error has been detected on the server. Causes might include one or more of the following errors:

  • The temperature of the server reached the non-critical temperature threshold.

  • The voltage of the server reached the non-critical voltage threshold.

  • A fan has been detected to be running at low speed.

  • The power supply has a critical error.

  • The power supply is not connected to the power.

Check system logs or internal error LEDs to identify the failed part.
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 accessed:

    1. Re-plug the power cord.

    2. 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.

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

    4. (Trained technician only) Replace the system I/O board.

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

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

  1. Re-plug the power cord.

  2. 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.

  3. If the problem remains, contact Lenovo Support.