Toshiba SD6100 DVD Player "change rca 480p 1080p" Questions

...change the HDMI resolution to 1080p now nothing dispaly on my TV just blank. How to reset the dvd player to the default value. please help If you want HDMI 'Auto' mode (the factory default), you need ...

...RCA-jack VGA or s-video or component video output). The device displays black screen by default unless you're using HDMI, so it's not possible to see the menu if using s-video. The manual states to ...