I have some curved upward horizontal convergence grids at the very bottom when in consumer advanced convergence. My convergence adjustments work correctly, the grid lines are white and it holds convergence great. The picture looks great in HD and 480i. The picture does not appear curved to my eyes but the black borders on either side of the image when displayed, are slightly bowed in. Is this adjustable thru service convergence? Otherwise the set at 9 years old looks great. It was moved to my residence about 4 months ago and was re converged once placed in the living room and was noticed then.