Brightness and dark scene problems

The TV's main culprits to be causing this problem are "dynamic contrast" which maybe darkening the backl light in dark scenes an example a night time or a dark scene in a movie. To make the blacks be deeper (as LCD/LED TV are rubbish at blacks) or brighten it on bright scenes to make the light be lighter and once again to make the blacks be deeper so the images pop out. Also "eco lighting" this will dim or brighten the image based on the amount of light in a room in order to be saving energy. Ether way the easy fix is to turn both of these features off. You will get rid of the problem and enjoy more subtler shades of colour that would otherwise be bleached (brightend) or crushed(darkend) out..

Back light 11..Contrast 72..Sharpness 20..Brightness 44..Colour 50..Tint 50.

Either the TCON board or the LCD panel has failed. Start by replacing the TCON board. If the problem persists, the panel is bad and the cost to replace it would be too high.

Did you try going into the menu and increasing the picture brightness?

That sounds like the tube tracking is out of tollerance and the auto grey scale can no longer work.
A new tube will fix this problem, so look at replacing the TV.

Might cause magnatic field,form.Try unplug,replug the tv an hour,move it couple inches to the left or right might help.

Most likely you have the opc feture on. go to the menu under picture setting first option should be to turn on or off the opc. turn it of and should solve the problem.

I had the same problem and so went into the menu and selected brightness and increased the number, and my dark pictures were much better.

try to open your tv and you can find the flyback ,in flyback you can see the screen and focus to adjust.use and try to rotate the screen,it control the brightness of your unit

If you feel good about opening your set then you can try this: Look for the flyback (high voltage) transformer, with the thick red wire which goes to the top of the picture tube. There are 2 controls on the flyback transformer, focus (top) and screen (bottom)Turn the brightness and contrast all the way down and then increase the screen control until you see retrace lines, and then back it down until those lines just vanish. Return the brightness and contrast to normal and adjust the focus control, if necessary, for a nice sharp picture. Let me know if that brings your brightness back.