I purchased a Samsung Lnt4061fx/xxa 40" LCD a few days ago. When I view anything on the TV, black and dark regions appear fuzzy with poor shading and WORST of all show a cloud of red pixels around the circumferance of the dark region.
Any bright and lightly colored scenes look fantastic, but dark parts are nearly unwatchable due to it.
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Dead and Stuck Pixels
Pixel defects for an LCD monitor are defined as one of two types: dead or stuck. Technically, both types of pixel defects are stuck pixels but it really deals with the electrical currents and the state of each pixel or sub-pixel.
A dead pixel is defined as a pixel or set of sub-pixels that has failed and is permanently in the off position. This condition means that the pixel will not let any light through. This can be observed as a dark or black spot on a brightly colored or white background.
A stuck pixel is defined as a pixel or sub-pixel that has failed and is permanently in the on position. This can be either with a single or multiple sub-pixels for a given pixel and is best observed on a dark or black background. A white pixel means all three sub-pixels have failed while a green, red or blue pixel means one of the sub-pixels has failed.
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If a whole line of pixels is dark, you've got a bad transistor in what's called a "Passive Matrix" display. For your future purchasing decisions, while an "Active Matrix" display costs a little more, it has individual transistors for each pixel, rather than one per row and column, so when a transistor goes bad, it only turns one pixel black rather than a whole row or column.
pixel are come from the screen panel. All LCD TV have these pixel and some do shows and some don't. Also depending quality of the screen panel. (These should be counted panel defective) according the information through the LCD factory.