Sound but no picture

Recently I left my TV powered on along with my Apple TV. When I returned home 45 minutes later both units had turned off. When I went to turn the tv back on I could hear the sounds from the Apple TV, the sounds of my remote clicking and the sounds from Netflix and the sound from an actual movie. BUT NO PICTURE. I’ve tried many of the Google search ideas including many options invoking holding the power button on tv, unplug tv from wall and wait 30 Seconds. Just one of the many commands I’ve reviewed and attempted with no success. It could be a failed backlight, but I’m feelings it’s something that happened when the tv auto turned off. Any suggestions would be great.