@mary175 do you have a WiFi booster or similar? The fact the TV reports a connection but no internet could be because the booster has lost its connection to the hub. Another possibility is thst the site the TV uses to test connection is down. Another suggestion is to reboot the TV which requires you to disconnect the power until the led on the TV goes out.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
