Good monitor but with typical LG-black level problem

Unlike competitor as Samsung can not make LG to make the monitor black display. Either leutet all gray or black to show the entire monitor is turned off. The latter is especially in movies such as the scene changes really annoying because 5 sec. Gray, then he goes out slowly and then gray. Sounds at first normal for scene changes, but on devices from the competition it looks a thousand times better.

As a 2nd monitor I have a Samsung brought me