100% is whats needed to be seen in my normally very brite radio room from 4-5 feet away. On the other hand, turning up the brightness to full on my 65" UHD LCD TV would over drive it. In the old days that would be called "Bloom" but in the LCD days its really a different thing. These units are not being over driven at 100% . At 70% a bit low to be brite with natural lighting in the room, by the Sun or by the next best thing in Led lighting. Currently my unit is at 70, 50, 25 on settings and even at 25% , its really bad still.
I really think the back lighting is failing and it is picking up the CPU noise you can also hear in the speaker. They seem to be dancing together
When things get really quiet , the display issue seems to go into remission till the next round of calls on the talk groups.
Shortly I will post a really bad looking video, last night the video I pulled down as some anonymous troll left an improper comment on the youtube so I deleted the posting.