I have a thin red line (and I'm not talking about the movie) in the middle of my picture, from the left hand side all the way to the right. It is not a convergence problem, I have checked all that I can. Its a runco 933 with an outboard trippler into an extron RGB switcher. I see the line on every source except the HD signal. Anyone ever seen a horizontal red line from a bad extron swithcher???