a9blue 0 Posted June 27, 2017 I have a Swann DVR 4 camera colour system. Two of the cameras are dome type ("Pro 531") and are both displaying the message "No video" with the picture flashing black and white in the background. They worked fine for a day or two but have displayed the message ever since. Ive tried their tech help but to no avail. Ive also tried changing the cables around but with no success. The two standard cameras are fine. Please help. Share this post Link to post Share on other sites
