It seems to definitely be a power problem as the small Red indicator light in the bottom center of the TV is not lit. You Tube has videos showing how to use LG TV's without a remote. I tried it on the living room TV and although cumbersome it works. On my model all TV electronics are in a bedroom cabinet relatively far from the outside TV. I suspect I will find the TV is plugged into the same spot as the refrigerator. Looking under the sink there are 4 outlets of which only 2 are used. It is also possible the TV was not plugged into the back side of the TV.
Ken & Monica, Peach Bottom, PA
2021 Allegro RED340 33AL ISB 6.7 Powerglide, Jeep Cherokee, Blue Ox, FMCA