After running initial trial at installation, unit would not "turn on" again.  After physically checking everything, saw internet videos & messages/reviews on our specific model documenting it would only turn on after being unplugged for a period of time.  That is the case for our unit as well.  How can LG continue to sell this unit after this problem has been documented?  Totally unacceptable, especially after we had standardized our entire home with LG products!