Samsung DVD-V90K Multisystem DVD/VCR "tv screen jumping down" Questions

...tv ( yellow, and white). Everytime we play a dvd it goes from a good picture to a dark picture that sometimes jumps around. Can you help me? On the remote control of the DVD player, just press the ...

...tv w/out any problems.But some pal dvds when played screen jumps up an down. Anybody knows how to fix it? Check your DVD player's color system, most multi system dvd player has to be set(PAL or NTSC) ...