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 The FM function of my MP3 Player doesn't work properly as it can only detect one or two channels. How can I improve its reception? My music player cannot be charged. How can I improve the bad recording quality of my media player? Technical Support If the answer can't help you, you can contact the Tech Support Department Get Started