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In some instances, switching off the TV by using the remote for an extended period of time can cause a change in the network settings.
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By default, the Samsung Smart TV regains its DNS servers settings on its own.
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if your MAC address of Samsung TV has been blocked for any reason, it's not able to recognize any wireless network further.
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It may be a reason that you have not downloaded or installed the most recent firmware updates.
Due to storms or heavy rainfall, the LAN cables get disconnected from your ISP. This may be a big reason for no internet connection issue.
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If you have an issue with the WiFi router or modem, your television won't be able to locate or connect to a WiFi connection.
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