Below is the step by step guidelines that can help you to fix the Firestick not connected to the internet problem:
Check the router configuration
Wrong router configuration could result in the FireStick Not Connecting To Network issue. So, check and make sure that your router meets the requirements for connecting the Firestick. And, if you are still unable to fix the problem, then it could be due to the same SSID for both the bands. Check and make sure that the network security type is correct and DOS protection is not activated.
The wrong WiFi password can also cause an interruption in the Firestick experience. You need to remember one thing that FireStick is sensitive to the special characters, so enter the WiFi password carefully.
Outdated Software version
The outdated software version of Firestick could be the reason that you are unable to connect it to the Wifi. Update the router to the latest version available and then try to connect it again. If your problem is still not resolved, you can proceed with the next troubleshooting step:
Check the WiFi Connection
You need to check if your internet is working or not. Sometimes the weak internet connection does not let users stream their favorite content. So, make sure that your WiFi is working fine. In case something is wrong with the internet device, proceed with the steps below: