I have a 27" RCA tv. About 3 or 4 years ago, the screens been gettin worse and worse. Before, it use to tint green and a little tap on the side would fix it. Then, it would become green more often and you'd have to really hit the thing to fix it. Now, it turns green, and after you hit it, the screen starts to flicker rapidly with audio flickering rapidly as well. My guess is bad ground solder connections but im really not sure. Any ideas?