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Hi @smkarrenlau
Just to check, were you able to detect your home WiFi network on your TV?
If yes, when you tried to connect did you receive any error message?
BasilDV
What is the make and model of your modem/router?
Have you tried to reboot the modem/router?
BasilDV
You still can't detect the WiFi on your TV?
Does your TV able to detect other WiFi networks available near you?
If there's no other WiFi network, you may enable the hotspot on your smartphone to check if the TV can detect and connect to it.
Let us know how it goes.
BasilDV
Since other devices are working, you may need to try changing the WiFi name and channel on your modem/router.
You may use this article as a guide.
Let us know how it goes.
BasilDV