Chosen Solution
@sam8823 “Now is it possible to damage T con board this way “ absolutely possible. Unlikely that you damaged the panel (sure always possible, but unlikely). “This “Also there were two conductive tapes between Lcd panels (one on left and one on right panel) and TV body. “ sounds odd. Post some good images of your Panel and the cables that enter the panel. Adding images to an existing question that way we can see what you see. You need to have more TABS on a 55” TV than 2. Also, let us know what the exact model is. This is similar to what you are looking for
