Do you have any ptc of a chassis for you to change, sometimes the ptc bad stains the color image
See how the video filters go ... and measure voltage on the 180V flyback pin ...
Use transistors or an ICVideo on the socket plate .....
If you use transistors measure voltage in B and C of each, they should measure the same (high voltage) ...
If you use ICVideo (ADD) try another ...
Sorry that there is not uploaded an image but I took several photos and you do not get to appreciate the problem anyway, I commented that it was like a soft orange trail but annoying to the contour of the images. Check all the filters and transistors and as everything was fine I solved the tube plate again and it was perfect. I clarify that I had already reviewed before that had ruled out a possible false contact. Thank you