@rodrigueza95278 that will depend on what TV this is and what you have for your LG phone. This is really not a repair related question but more of a user interface question. I would suggest you look at something like [https://www.hardreset.info/devices/lg/lg-k40/faq/faq/how-to-connect-phone-to-tv-wirelessly/|this site] since it will work the same way for your model.
Translation
@rodrigueza95278 eso dependerá del televisor que sea y de lo que tengas para tu teléfono LG. Realmente no es una pregunta relacionada con la reparación sino más bien con la interfaz de usuario. Yo sugeriría que usted mira algo como [https://www.hardreset.info/devices/lg/lg-k40/faq/faq/how-to-connect-phone-to-tv-wirelessly/|este sitio] ya que funcionará de la misma manera para su modelo.