No picture on Television
You have provided incomplete information.
What do you mean by 'dvd player works'?
Do you mean you are able to view the DVD movies on the TV? Or does it mean that there is power and various lights and indicators on the DVD player?If you are unable to see picture - both while viewing DVDs and also Broadcast channels, then there is a major problem with the TV.Get a professional to have a look, then.
But if you are able to view DVD movies, but unable to view broadcast channels, then it is a simple problem of input selection. In this case just select the TV/Video or TV/AV button on your remote, if there is such a button. If no, then use the menu and scroll for input, and then select Tuner.
First clearly state what your problem is. Only then we can give you better advice.