if you'd like to check on the brightness setting (black level), then put the monitor on an unused input, get real close to the screen and try this;
when the setting is good, if you increase brightness by 1 notch, then the image will be brighter; if you decrease brightness by 1 notch, then the image will not change brightness, it will not get any darker. this is the optimum setting.
just don't forget to put the control back to where it was.
this has to be done in the same room lighting condition that the monitor was adjusted on.
what you'll see, by getting close to the monitor, is a dark gray image and some noise on the screen.
I just finished trying this. Put TV in HDMI 3 where nothing existed. Noticed the mode changed, so I set it to THX Cinema. The brightness was at 44. I had to change it to 50 before I could detect any change. Set it back to 44. Will have to try that with something playing on HDMI 1.
