Need Television Expertise

[Ohaider]

Okay, I found an old television in my basement and an AT&T cable box and decided to hook it all up
I got it all hooked up and working, but this happens to me


When i play around with the cable connecting the box to the television, the black bar moves to somewhere different, Sometimes it gets pretty close to like perfect, but still no luck. It's always split

Anyone know if there's anything i can do to fix this? I figured this was a problem with the cable/box and NOT the television itself, but anyways thanks