I have a Vizio smart tv model V436-G1

Nice to meet you, *****!
Just to make sure, have you tried to restart your TV?

Alright, *****, does it show any network in the Wi-Fi connection menu?

Ok, and what error does it give you when you are trying to connect to a hotspot, for example?

So no error codes or additional info, correct?

How long have you been using that TV?

Ok, got you.

Ok, we can try the Factory Reset option. If it doesn't help - then that will indicate a hardware issue with a Network module.

1. Press the Menu button on the VIZIO Remote.
2. Highlight and Select the System option.
3. Highlight and Select Reset&Admin then Reset TV to Factory Defaults or Clear Memory (Factory Default)
   The system option tab from step 2 may be labeled as "Help".
   Try to Factory reset and notify me about the outcome, please.

Ok, good.
You may have to do an initial setup.

Alright, follow the prompted instructions, in one of the steps, there should be a "Connect to Internet" step.

Notify me if you will need any help.

Ok, if the Internet Connection step went through, then it is working.
Wait for it to restart and check the internet connection, please.

Finger crossed indeed.
Notify me about the outcome, alright?

Ok
How is it going, *****?

Ok, so it is downloading updates, right?

Ok, I may consider it as an indicator of a properly working Internet connection, but let's check it when it's done.

👌

Ok, good.

Glad to hear that, *****!
Is there anything else I can do for you today?