1. Be sure the WiFi SSID (your network name) is simple.
2. Be sure the TV's time is correct and matches the time that the router has.
3. Be sure the distance from router to TV is 20 feet or less with no obstructions.
4. The TV firmware shall be up to date and same for router.
Try setting the DNS in the TV to 188.8.131.52 (how is in the manual or the Internet.)
The tvs wifi was working perfectly never needed to reconnect.
Until one day everythig was buffing and saying connection error. My wifi said its connected but it wont work until you disconnect and re put in the pass word. Im not sure why it keeps doing this, but i have to do this everytime i turn on the tv now. How do i make it connect properly without having to connect again to wifi everytime.