Finally fixing my late 90's Zenith

[llcvt15]

The TV that gets the most use in my house is a floor model Zenith, the model number is A27A74R, and it was built in 1998. Since I bought it about five years ago it doesn't really display the color blue very well, if at all. This drives most people crazy, as the screen has a permanate yellow tint. Though I still have at least 75 other TV's I could choose from I really like the cabinet style of this set, and I'm finally going to call someone for service. Just was curious if somebody could tell me what to expect being wrong with it before hand.

Also guess I'm writing this as I was a little surprised to see a Zenith produced as late as 1998, guess I was under the impression they were defunct sometime before 1995?