I'm no expert and don't mess would be White balance control but I can tell you that brightness at 56 is too high. The consensus seems to be between 50 and 53 (depending on the panel). Anything above that and you lose your black. Black becomes gray. I use the gray bar steps pattern on DVE and AVSHD709 and 53 is just right on my set. Anything above that and the black bar becomes distinguishable from the below black bars which means black is turning gray.So I got my set delivered yesterday and briefly messed around with a pluge pattern (Spears and Munsil (without the equal energy border), has a checkerboard pattern as well with 16 and 17 black squares). How noticeable is the black glow when adjusting brightness? I only observed briefly, but I didn't see a pure black, and then a near black with a glow, it just jumped right to a dark gray at brightness 56.
I also experimented with 5% luminance, even pushing it to +50 I didn't notice any change in 17 nor the 2% blackness bar. What am I doing wrong?