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Power supply LEDs

This topic provides information about various power supply LED status and corresponding action suggestions.

The following minimal configuration is required for the server to start:

  • One processor in socket 1
  • One DRAM memory module in slots 6
  • Two power supply units in bay 1 and 2
  • One boot drive, M.2, 2.5-inch, EDSFF E1.S 5.9mm drive, or E3.S 1T drive and RAID adapter if configured. (If OS is needed by debugging)
  • Five system fans
  • One OCP module with required cable (if network is required)

The following table describes the problems that are indicated by various combinations of the power-supply LEDs and the power-on LED and suggested actions to correct the detected problems.

Figure 1. Power supply LEDs
Power supply LEDs
Table 1. Power supply LEDs
1 Input status
The input status LED can be in one of the following states:
  • Off: The power supply is disconnected from the AC power source.

  • Green: The power supply is connected to the AC power source.

2 Output status
The output status LED can be in one of the following states:
  • Off: The server is powered off, or the power supply is not working properly. If the server is powered on but the output status LED is off, replace the power supply.

  • Green: The server is on and the power supply is working normally.

3 Fault LED
  • Off: The power supply is working normally

  • Amber: The power supply may have failed. Dump the FFDC log from the system and contact Lenovo back end support team for PSU data log reviewing.