Hi! First post in this section! I have a what appears to be a bunch of faint horizontal lines in a trapezoidal shape on my screen, especially noticeable on very dark scenes. It sometimes goes away and then will come back every 5 mins. Also when I first turn on my tv a single green colored horizontal line appears and then quickly disapears. If I turn my brightness up it is kinda hard to see but then the black backgrounds are kinda washed out. Any thoughts on what it might be? Other than that it has been a real good tv for the past 6 yrs. Thank you!