tv not working

You need to be more specific as to how it "stopped working". That is a rather broad statement. If the wireless was connected to the TV and that no longer works then you just need to rejoin it to the network. Depending on the manufacturer the menu options can vary to get to the setup option for the network connection. The TV manufacturer might have FAQs and setup steps on their support site that could make it fast and easy. 

Same thing internet working all devices but online TV not working with T-Mobile Internet, TV working with all other internet providers, i am calling t mobile about this issue, but they are not figure out what is a the problem, i am still waiting for fix this issue this month, otherwise need change network provider