Does anyone know the service code for this problem? My Sony KP51-WS500 will show the video source for the input in the top left corner in bright green and then it just fades to dull green. It used to go away after about 5 seconds, but now it stays as long as the picture on the TV is on. I think I might have inadvertantly reset a code in the service menu when I was adjusting the color convergence.