Skip to main content

Processor board LEDs

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

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

Figure 1. Processor board LEDs
Processor board LEDs
Table 1. Processor board LEDs
LEDDescriptionAction
1 System error LED (yellow)When this yellow LED is lit, another one or more LEDs in the server might also be lit to direct you to the error source.Check system logs or internal error LEDs to identify the failed part. For more information, see Front-operator-panel LEDs and buttons.
2 DIMM error LEDs (amber)When a memory module error LED is lit, it indicates that the corresponding memory module has failed.

For more information, see Memory problems.

3 System status 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 the system status LED is blinking fast over 5 minutes and cannot power on, check 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 technicians only) If the problem remains, capture FFDC log, and replace the processor board.

    4. If the problem still remains, contact Lenovo Support.

4 FPGA heartbeat 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 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.