[KDEuserX]

Hi, I had same problem (on tv-out, only sound) and problem was that cable, it dosen't work correcly, somtimes it works, and somtimes it dont, try anothr cable.

also my tv out cable goes to head-phone jack.

EDIT: and to get playr to tv-out mode:

Go to main menu, and select options>TV mode>PAL(or NTSC)
then go back to options menu and select TVSWITCH and select on and plug your tv-out cables to tv and then to your player, thats how it works on my mp5 player (product name: S400, major version ID: 3.0, hardware ID: RK2706)