CRT display TV conversion, why line into the moon-shaped pieces

Images on both sides of the curved inward

line linear distortion, the panel set up to adjust, not so good deflection coil tube on the side of the phenomenon Compensation paste disk.Regulator to try to control the menu display will normally be there, even if does not work out why change it?
A VGA to AV formats East is not yet on line?
Also destroyed the mill The original VGA./ Take a look at it.