I discovered lately that it is wise to avoid certain news stations with white banners along the bottom and their big station ids. I don't spend a lot of time on them (and now just about none), but initially when I did see similar image retention and stopped watching it took some time (days) to go away (or for me to no longer pay attention / notice). (I also did the built-in screen wipe a few times and the WOW pixel flipper once.) And sneaking a peak here and there seems to bring it back pretty quickly; presumably it's since gone away again. So best to avoid even the peak sneaking. (If I ever get the urge again, I can turn the lcd tv on in this room.)
I checked to see if I was still using my old settings from way back when (the old Home Theater mag / Sound & Vision ones), and yes I had not slipped into torch mode. But I think I will go ahead and pull out the calibration disc and nudge something(s) or other(s) down a bit, including the contrast. I haven't done that in quite a while, well before swapping out the SC board last year.
Oh, and I've probably been seeing brief spurts of image retention for just the little things that show up now and then, e.g., one time I recall seeing the little image of a movie poster stick around for quite a bit after leaving the directv menu. Not sure if the tv's more sensitive as of late, but it did seem at first to be rather impervious to such things after making that board change.
Last edited by fmalczewski; 02-05-2017 at 10:34 AM.