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System-board-assembly LEDs

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

Figure 1. System-board-assembly LEDs
System-board-assembly LEDs
Table 1. System-board-assembly LEDs
LEDDescription and actions
1 System error LED (yellow)LED on: an error has occurred. Complete the following steps:

  1. Check the identification LED and check log LED and follow the instructions.

  2. Check the Lenovo XClarity Controller event log and the system error log for information about the error.

  3. Save the log if necessary, and clear the log afterwards.

2 Identification LED (blue)This LED is used as a presence detection LED. You can use Lenovo XClarity Controller to light this LED remotely. Use this LED to locate the server among other servers visually.
3 BMC status LED (green)The states of the BMC status LED are as follows:

  • LED on: The BMC is alive.

  • LED off: The BMC is not ready or not alive. The LED is in this state when the server is first connected to AC power. It does not turn on until the SSP (Synchronous Serial Port) is ready.

4 BMC heartbeat LED (green)The BMC heartbeat LED helps you identify the BMC status.

  • LED on: The BMC is not alive.

  • LED Blinking: The BMC is alive.

  • LED off: The BMC is not alive.

5 SSP heartbeat LED (green)The states of the SSP (Synchronous Serial Port) heartbeat LED are as follows:

  • LED on: The SSP is synchronized and ready.

  • LED off: The serial port interface is not synchronized yet.

6 Rear PCIe riser 1 error LED (yellow)LED on: an error has occurred to the rear PCIe riser 1.
7 OCP error LED (yellow)LED on: an error has occurred to the OCP slot the LED represents. Complete the following steps:

  1. Make sure the PCIe cable is connected to the appropriate downstream PCIe slot 15-16 or PCIe connector 1-12.

  2. Make sure both ends of the cable are securely seated in the PCIe slots.

  3. Replace the cable.

  4. (trained technician only) replace the system board assembly. See System board assembly replacement (trained technician only)

8 System power LED (green)The states of the 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-control 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. You can press the power-control button to turn on the server.

  • Lit: The server is turned on.

9 FPGA heartbeat LED (yellow)This LED indicates power-on and power-off sequencing.
10 Processor error LEDs (yellow)LED on: an error has occurred to the processor the LED represents.
11 DIMM error LEDs (yellow)LED on: an error has occurred to the DIMM the LED represents.
12 Fan error LEDs (yellow)LED on: an error has occurred to the fan the LED represents.
13 PCIe connector error LEDs (yellow)LED on: an error has occurred to the PCIe connector the LED represents. Complete the following steps:

  1. Make sure the cable is connected to the appropriate downstream PCIe riser, drive backplane, or OCP adapter.

  2. Make sure both ends of the cable are securely seated in the PCIe slots.

  3. Replace the cable.

  4. (trained technician only) replace the system board assembly. See System board assembly replacement (trained technician only)

14 M.2 error LED (yellow)LED on: an error has occurred to the M.2.
15 Rear PCIe riser 2 error LED (yellow)LED on: an error has occurred to the rear PCIe riser 2.
16 CMOS battery error LED (yellow)The system CMOS battery is not installed or is not working.
17 System board assembly error LED (yellow)LED on: an error has occurred to the system board assembly. Complete the following steps:

  1. Check the Lenovo XClarity Controller event log and the system error log for information about the error.

  2. Save the log if necessary, and clear the log afterward.