I am experiencing an issue where my TK800 will significantly drop its brightness and at the same time I hear an increasing humming coming from the projector. I though it was a Dynamic Iris because of the button on the remote, but apparently it doesn't actually have one. I have the Light Mode set to Normal.
The source is a Windows 10 PC with an NVidia 1070 Ti.
If I bring up a control panel screen that is primarily white, the brightness will jump up after several seconds. If I close that window, the brightness will drop again after several seconds.
Any clue as to what is going on?
Try turning off smart eco and see if the behavior changes. Hopefully it’s not an issue with the lamp/ballast. I’d also contact BenQ for troubleshooting.