You can add a picture to your post by selecting the 'Option' tab and clicking on 'Add/Update'. From there on this is straigth-forward. Bieele

Please take a look at the attached photo from my Avant 100Hz (not RF). I see this picture everytime I should have a complete black screen; for instance between zapping stations or a minute or so after using AV-DVD or TV. Over the last half year this effect became stronger and stronger; I even see it sometimes during dark scenes in movies or tv shows