If your Smart TV is not recognizing your network password, here are a few things to try:

1. Check that you are entering the correct password. It is case sensitive.
2. Check that the Wi-Fi signal is strong enough to support your device. Try temporarily moving your router closer to your TV.
3. Perform a Network Reset. Factory Resetting your device may also help.
4. Reach out to your internet service provider for further troubleshooting help.