phillips dvd player vertical hold?

my dvd player is combo home theater system. i purchased a new tv and have the composite cables to hook it up now and when i hooked it up and inserted a dvd the its like the vertical hold needs adjusted. i have tried hooking up a s-video cable also and still has the same problem. the cd part still works as well as the stereo features. any reccommendations, i like what i have because it is an all inone unit.