To fix Google Assistant not working on Google TV, follow these steps based on the provided resources:

  1. Check Device Status

    • Ensure your Google Nest or Google Home speaker or display is powered on and plugged into a wall socket.
    • Verify the microphone is not muted; consult the specific instructions for your device model.
    • Look for spinning or blinking LED dots on top of your speaker or display when you say "Hey Google".
  2. Reboot Speaker or Display

    • Disconnect the power cable from your device.
    • Wait a few seconds and reconnect the power cable.
  3. Ensure Hotword Recognition

    • Confirm that your device recognizes the hotword by saying "Hey Google"; check for LED indicators.
    • Try speaking more clearly or asking the question differently.
  4. Adjust Hotword Sensitivity

    • Use the Google Home app to adjust the hotword sensitivity setting.
  5. Submit Feedback Report

    • Enable device reports and system logs in the Google Home app.
    • Submit feedback through the Google Home app.

For issues specifically related to Google TV remotes:

  1. Turn on Google Assistant

    • Go to Settings > Device Preferences > Google Assistant and ensure the feature is turned on.
  2. Remove & Retrain Voice Match

    • Reboot your Chromecast with Google TV (4K).
    • Remove and retrain Voice Match using the Google Home app under Assistant Settings > Voice Match.

Remember to wait for the device to complete its setup process before testing Google Assistant functionality again.