DVD blank screen problem

[ydchoe]

I was watching DVD on my screen today for the first time and it was working fine, but it went blank (black screen) after I change the screen to see other setting and came back to see the movie again. Sound from movie comes out fine, but no screen. I change it back to NAV or any other, screen works just fine. I did do DVD in motion coding and was playing movie from my USB stick. I also tried to watch regular DVD movie, but same issue. Not sure what is going on?? Help..