How can I fix an RCA Color TV that is about 10 yrs old?

The screen has horizontal, thin, white lines that are spaced about an inch apart on the screen with a set of horizontal, thin, white lines that are slightly more faint in the background. They appear intermittently and either fade immediately or appear for several minutes (or longer) before fading. Also, the screen itself looks like it has a transparent film over it, with the picture still visible behind it. The sound is not affected. Would it be worth having the tv fixed or begin looking for a new one?