Hitachi Projection Color Lines

The television has a great picture with the exception of 3 wavy lines in the top right corner. They are faint, red, blue and yellow wavy lines, that show on every channel. When I attempt to adjust the convergence, the area on the convergence screen where the lines display are out of whack and can not be adjusted exactly. Can you tell me what the problem may be and what I would do to fix the set.