First the picture is ok and the sound is ok...after a few minutes a diagonal lines appears on the screen and becomes more brighter,but the sound is still ok, only the picture is the problem.

i measure the ABL pin of the flyback and i found out that the voltage is not steady or it is varying..i adjust the screen voltage of the flyback and it returns to normal but the picture is not good, the color is not good as it must be..

by the way, someone with PDF TDA12000H1/N1F00/
hoping for your help

Televison & Video - Konka - K2568U 25" TV