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 can't I find or delete files in the music player? My music player cannot be charged. Lyrics are not displayed correctly on my MP3. How can I set the lyric syncing function? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started