Speaking of Blu-Ray players...

[olnacl]

Agree with Tasty! Check connections and correct cable color to jack color. I've seen the same problem on mine when I crawled around behind it or moved something around and one of the cables got disturbed. You can always try another RCA cable - they don't have to be the color coded Component cables, just a good quality cable and attention paid to hooking them up correctly for a test.