Originally Posted by MechanicalMan
This is my experience with a Zenith Z50PJ240 (2010 model, presumably the same as the 50PJ350)... my MLL has lowered from 0.026 fL to 0.012 fL
Time has passed, and I remember that there were (ignorant) people claiming that these adjustments are harmful. So I want to post an update. After putting many (<--MANY) more hours on my TV, I am still able to consistently measure the MLL at 0.012 fL. In fact, when the TV is first turned on or a black image has been displayed for awhile, I measure an MLL of only 0.009 fL. So, if anything, it seems that my own MLL has very slightly decreased (previously, my measurements ranged from 0.012 - 0.015 fL; they now range from 0.009 - 0.012 fL).
Thanks again to everyone who has contributed to this topic. Frankly, I don't think that anyone buying a new plasma TV today, in any price range, should consider LG. But for those of us who already own one, these adjustments can dramatically improve the MLL.
One last comment about the changes I made: I didn't test Vy on its own, but changing Vy after the other changes did introduce pixel misfires, as I mentioned before. It's a minor problem, IMO -- the misfires occur for (literally) about 10 seconds while the TV heats up. I only mention this because you might want to avoid adjustments that cause pixel misfires if you plan on selling your TV in the foreseeable future. In my case, adjusting Vy and introducing pixel misfires decreased the MLL by only about 0.003, and I can see how pixel misfires would be alarming to buyers.