Home Assistant Green Not Booting or Network Issues

Problem Description

Your Home Assistant Green is not booting up, not accessible via homeassistant.local, or showing network connectivity issues.

Common Causes

  • Incorrect power supply
  • Ethernet cable or port issues
  • Corrupted installation
  • mDNS/Bonjour not working on network
  • IP address conflict

Solutions

1. Check Power and LEDs

  • Use the included USB-C power supply (5V/3A minimum)
  • Green LED: System is powered
  • Yellow LED blinking: System activity
  • If no LEDs, check power connection and outlet

2. Check Network Connection

  1. Ensure Ethernet cable is firmly connected
  2. Check for link lights on the Ethernet port
  3. Try a different Ethernet cable
  4. Try a different port on your router

3. Find the IP Address

If homeassistant.local does not work:

  1. Check your router admin page for connected devices
  2. Look for device named homeassistant
  3. Access directly via IP: http://YOUR-IP:8123
  4. Try using the Home Assistant mobile app to discover

4. Wait for First Boot

  • First boot can take up to 20 minutes
  • Do not unplug during this time
  • Yellow LED activity indicates system is working

5. Factory Reset

  1. Download Home Assistant image for Green
  2. Use Raspberry Pi Imager or Balena Etcher
  3. Flash to a USB drive
  4. Boot from USB to restore

6. Check Router Settings

  • Ensure DHCP is enabled
  • mDNS/Bonjour should not be blocked
  • Try assigning a static IP via router

When to Contact Support

Contact Home Assistant support (community forums or Nabu Casa) if the device will not power on at all or shows signs of physical damage.