'''bakhtiyar.badar''' that will depend on what these dark spots look like. It is possible that this is a bad backlight array, LED covers that have come off or a bad signal etc.. Remove the TV from power by unplugging the TV. Remove all video inputs. Hold down the power button for 30-60 seconds. After that connect the power to an outlet and use one local video source(i.e. DVD/BR player) and try to turn your TV on. Let us know what you get. You can always post some images of what your TV shows with your question. That way we can see what you see. [guide|21499]