Originally Posted by nzkiwisteve
Thought I'd add my 2 cents worth to the flashlighting dilemma.
After sending my first 55LM7600 back due to excessive bleeding I discovered my replacement set was only a little better. I was quite disappointed and had arranged to visit the store manager to discuss the issue, photo evidence on my phone. But I got home one afternoon some days later and the tv had been on for a few hours and I realised I could hardly see the problem. Even in the worst case just after the set is switched on there was only the slightest bleeding visible in the bottom corners and the upper right corner. Now, a few days later, it has settled to a very low level. I'm beginning to believe that there is a period of "settling time" with this set as others have commented on.
So I decided to switch LED Local Dimming onto Low to get rid of the last traces of the problem and spent some time tweaking the other settings to get the grey scale performance to what I consider acceptable, and to improve what I considered a "soft" image. Here are the settings I finally settled on (some of these settings come from information found in online reviews):
I'm on the same boat. Picked up my LG LM7600 last week from Best Buy. It had 4-5 spots of Backlight bleeding on the top, and another spot on the bottom left corner. Tried tweaking the picture settings and could not get them adjusted to a level I was comfortable with. Updated firmware, loosened screws, none of this made a difference. I ended up exchanging it for the same model.
My 2nd one still has backlight bleeding issues, but just on the top. Backlight bleeding is not as bad as the first one. If the backlight bleeding was evenly spread out I wouldn't have an issue with it. But the fact that they're round spots on the top edge ruins it for me. Once I've seen it, I'm always looking for the flaw and it bugs me. As others on here have stated, a $1700 TV should not have any flaws. The flashlighting isn't just noticeable when switching inputs, but also with the black letterbox, darker movie scenes. Even in lighter movie scenes, the flashlighting will cause colors to be washed out.
At this point I'm torn between either trying for a 3rd LG 7600, or going with some else entirely. I love everything else about the TV so much that I'm willing to give LG a third chance. Or I may either go with a Samsung LED TV, or just go to the dark side with a Plasma (Panasonic GT50 or VT50).
Based on what I've read, the flashlighting is usually more of a problem with edgelit LED TV's that have a thinner bezel. My concerns about going with a plasma is of course the burn-in, inferior 3D (plus who wants to pay $50+ for 3D glasses), not as aesthetically pleasing, heavier, bulkier, hotter, buzzing, dull colors (white levels), performance in low light.
I'm surprised at how high the reviews have been for the LG LM7600 (Amazon, Best Buy.com) compared to comparable Samsung LED models. Most people must not notice the backlight bleeding. When I took my first one in, the customer service girl was giving me weird looks. They tested the TV out in Best Buy and could not really see the issue, but of course the store was extremely well-lit.