My Samsung TV (model UTU700 43 inch) has been set up and working for about a year now. However, 2 days ago it stopped being able to connect to the internet. It says it is connected to the local network but not to the internet. However, my network connection is fine and all my other device are working on the internet as usual. When I tried connecting it to my phone 4g (i.e a different network) it came up with the same issue. 

The television had auto updates turned on so it should be up to date. I have tried turning it on and off again. I have also tried turning my router on and off again. 

Can anyone help?

Error shown in network settings on TV below?

'Unable to connect to the network

1)Try logging in to your internet service network 2)Try contacting your internet service provider for more information'