Sony digital tuning drifting

[persons0]

Just as I posted never having a single issue with one of my old Sony TV's I go and turn on the 19" and it has a problem. I don't know anything about TV's so please forgive my poor vocabulary.

Here is the problem: I am running the TV on cable and it does not tune in a station and I can usually hear the audio from an adjacent station. It is a digital tuner (I think) that changes channels when you press + or - (no dial is what I'm getting at). There is no fine tuning controls for signal that I can see. Can this be easily fixed by say opening it up and turning a pot or something? Or is something seriously wrong?

TV is a Sony KV-1972R

Thanks!