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To answer your question ->
Seems like that TV network settings are not able to establish a connection, the suggestions are:
- Resetting the ISP's router + changing it's IP address by rebooting the router and waiting 30 minutes
- Factory reset the TV by unplugging it for 45 minutes from power
Changing DNS to 220.127.116.11 or 18.104.22.168 on the Router
- Updating the firmware on the TV
- Calling the Internet Service Provider to make the DNS change
if that doesn't work then submit a hardware service request with the manufacturer.
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