I have tried every possible setting on my lg tv and ta-1012, no success. I cannot recall the name of the but i get a free app from google play store which were able to mirror photos and videos on lg tv. I will update this topic if I can remember the name of the app.
Now I am using android tv box connected to my lg tv, so no more casting problems.
However, you should be still connecting to your tv for netflix, youtube, spotify, etc.
Google removed miracast yonks ago, you can only do it via Chromecast now.