Color Adjustments....

I'm working on the color adjustments for my parents television..(Zenith) Most of the time, the color and objects have a green hue to them.....I am looking for the standard settings for the television, so I can set them manually. Can you give me the suggested setting rates for each of the settings...(i.e. color, sharpness, contrast, etc.)

The adustments are made on a line system, with a vertical bar that goes up and down the horizontal line, instead of being able to run the adjustments up and down by either an amount ( some tv's might say, color 50 contrast 30, etc) With the line system the way it is, you pretty much have to guesstimate......can you give me an idea where each of these should be set?

Can you please help?

Thanks!!!