It began with a slide in the presentation went black. The next time a few more until they are all black.  The preview slide still displays correctly. When I go in to edit a song it displays correctly but when I add it to the schedule it's black.  You can't see the verses words of the background.  It displays ok through the projector.  It makes it really difficult for the person  running the service at the computer to know which verses are showing. I tried renaming the user setting