Hey Lloyd! My pleasure. We're glad to be of help any way possible. Hmm that is odd! I believe I was using HDMI on the computer I made the screenshots with as well, so I don't think that would be the problem. You could check and make sure the resolution is no higher than 1920x1080 and no lower than 1024x768. Then maybe of course restarting the computer, ensuring displays are connected first. To be clear, are you selecting on one of the displays in that window in Step 6, and *after you click one,* it just won't show up? Keep in mind, if it's just showing black, MAYBE that's because you just have a black desktop background? So try to fire something from MediaShout or make sure there's a desktop wallpaper on to use to preview. If it's not one of those simple things, you may have to try
updating your video card driver, etc. Maybe OBS has a support forum or something that would be able to provide some insight!