How to fix the picture of the TV it's all ziggy

How to fix the picture of the TV it's all ziggy

Ok the TV powers on but the picture is all zigged and zaggy like a bad connection from cable but it's just the t.v picture

ANSWERS:

Demetrio Trujillo that could be caused by a bad T-con board. You will help yourself tremendously if you let us know what make and model your TV is. You also should consider posting some images of what your screen displays, with your question. For that use this guide