In which mode of MP820/840/850 can I play .SLS files as the screen saver? Category : Setup / Operation The slideshow screen saver of MP820/840/850 is only applicable to the Music mode. MP820/840 will run the default screen saver (Blank) in Record and Radio modes if the slideshow screen saver function is enabled. Is the answer helpful? Related Why isn't the countdown for the remaining recording time of my Digital Music Player running? What file formats do my media player support? How do I convert files? Why can't I find or delete files in the music player? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started