How do I fix convergence problems RCA HD52W59?

Hi, My 18 month old RCA 52" projection tv's picture bowed 1 month ago and the picture is shadowed. I called RCA, they say it sounds like a convergence problem and directed me to a tv repair company who wanted $250 dollars just to look at it. I have an associate's degree in electrical/electronics. Can I fix the problem myself? Where do I get the parts?