I have focus issues with a Sony 43HT20, 43" rear projection tv. The images don't look too bad, but the focus is off when letters/words are on the screen. It's almost like the "double" effect. This TV has not had servicing so I'm guessing it could use some work. I don't know much about these tv's, but can someone tell me if the focusing concern is fixable? Would it be worth the repair?

Thanks in advance.