If your screen blacks out while the speakers carry on, here's how to try and restore the magic.
https://www.howtogeek.com/tv-has-sound-but-the-screen-is-black/?utm_source=dlvr.it&utm_medium=blogger
https://www.howtogeek.com/tv-has-sound-but-the-screen-is-black/?utm_source=dlvr.it&utm_medium=blogger