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Dark and slow picture on Grundig / Samsung lcd

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    Dark and slow picture on Grundig / Samsung lcd

    Hi, I'm new here, so do not mind if I do something wrong or bad english.

    I have grundig LCD 32 inch TV. The panel is Samsung LTA320AA05, tcon board is 320AA05C2LV0.0 When I got the TV image was duplicated, slow and dark.

    I have solved doubling by giving pressure on the first test folie on the side of the panel. Now I have a problem with a slow and dark picture. When the picture is stationary colors are a little darker, white is a little yellow, but on menu white is bright, moving picture leaves a trail, old frames slowly vanishing and new ones slowly appears, and when moving mouse on screen that is as an old feature in Windows when cursor leaves a trail. This occurs via HDMI and VGA inputs, over s video and scart input image is black, except that else everything works ok. Can it be bad tcon or mainboard?
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