A HATACHI 46 INCH SCREEN MODEL 46UK20B/21K THE SCREEN WITH A RAINBOW EFFECT. YELLOW AT THE TOP OF THE SCREEN AND BLUE AT THE BOTTOM. I REMOVED THE FRONT GRILL. PRESSING THE CONVERGENCE BUTTON I GOT THE PLUS SIGN AND I ATTEMPTED TO ALIGN THE RED GREEN AND BLUE COLORS BUT I COULDN'T ALIGN THE BLUE GUN. THE OVERALL PICTURE IS AMAZINGLY SHARP EXCEPT FOR THE ABOVE PROBLEM. ANY SUGGESTIONS?????