I have a Toshiba 65hx81 rear projection television with a shaky picture that clears up after 20 minutes. After having replaced the convergence circuits this is the only problem. I saw advice saying there were bad caps, and to spray some "freeze" on them till the pic came back and I would find the bad part. Admittedly, I don't know what that means. Please help with more specific directions

Windsong, October 2009