I bought a 65" Mitsubishi DLP RP, model is C657, which is 65733 minus one HDMI input. I am fine with that. But I believe they use the same light engine.

Last night I sit down and tried to do some calibration while I turned off all lights. I found even when the scene is totally dark, the screen is still BRIGHT! I set brightness to 24 and contrast to 24, blackness is not good. I turned brightness to 0 but there is no impact on blackness, it is still bright.

Any idea? Thanks.