Blinking Green Power or System LED for Intel® Server Boards and Intel® Server Systems


Maintenance & Performance



What is happening when I see a blinking green Power Supply Status LED?

  • One blink per second means that the power supply is off, or in cold redundancy. Cold redundancy means one power supply is in an efficient low-power state, and it is not activated until it is needed.
  • Two blinks per second means that the power supply is updating its firmware.

This power supply status is normal behavior.

What is happening when I see a blinking green System Status LED?

  • The system has just had AC power applied.
  • The system is operating in a redundant state but with an impending failure. For example, two redundant power supplies are installed, but one has failed or is predicted to fail.
  • The system is in a Degraded state. The system is still functional, but a non-critical temperature or voltage issue has occurred.
  • Memory configured as RAS has failed.
  • Memory is transitioning to a warning state.

How to fix it

  1. Wait 20 seconds after applying power, before turning the system on.
  2. Update the motherboard system firmware to the latest version.
  3. If the issue persists, view the System Event Log (SEL) for reported issues. A SEL Viewer is part of the BIOS and Firmware Update, Configuration Utilities for Windows*, Linux*, WinPE*, and UEFI.

For complete LED information, see the Technical Product Specification (TPS) for your board or system.