Originally Posted by RapalloAV
Manni was it you that said +14 contast, -7 black with enhanced?
Yes, although it might vary unit to unit, but it's closer the what's most often found.
When using hdmi enhanced, it is advised to set contrast first, as it has a strong effect on brightness.
If you set brightness first, you are likely to raise your absolute black level.
By the way, these values are meant to target 235 for contrast, not super white.
The main benefit is to deal with the slight black crush (present in hdmi standard).
However, depending on the way you set enhanced and on your lens ap settings, you can easily raise black levels and hurt on/off.
To debug, I highly recommend using hdmi standard with values at zero, zero as it's usually a safe fallback.
You are likely to have a slight black crush (level 17 might not show) but otherwise it should give you a good starting point (in a bat cave with a nominal gain screen) unless there is something going on with the avr/source.
Ymmv, yada yada yada