hello colleague: generally the prob, of the fine lines of delay at the top of the screen is due to the 100mfx35v capacitor q, is connected between pins 6 and 3 of the vertical lc ... as long as it is the LA78040-TDA9302- STV9302-STV8179 -... when this capacitor is running out thin lines of delay appear on the top of the screen ... there is, change it for a new one with the same characteristics and taking care of the position and polarity as is the original .... below I leave an image of a vertical ic and see that, between pins 6 and 3 there is a capacitor to which there are q, change .... greetings !!! https://ibb.co/8Npz24L