Ck with consumer reports I believe they recommended after five yrs its not worth it.you probably be better off to invest in another set. You could get a estimate the repairs on that type of set is quite expensive.
The answer comes in the form of a question. Is the television capable of digital reception that is slated to replace analog this next year, and would the cost to repair (it could run from $100 - $500) the set be a better value to you than purchasing new. My estimated cost is just that, and estimate. I am seeing new big screens (52") as low as $1200.