Hello yoreparo beautiful people so long I am with this TV philco as I mentioned model pf2907e that turns on and off taking into account that it is appreciated to see. A horizontal line of lack of vertical scanning I proceeded to change its replacement La78041 with LA78045 and changing all the filters did not solve it. The yoke makes a small spark against a barrel where the clamp goes, thinking I could and suspecting the yoke I tried with another tube and a 20-inch TV yoke, it is possible to open the screen with black lines and turn it off. On your TV and you still see the horizontal line. I don't know where the protections of this TV are. I did not want to raise the r 830 of 1k that goes to leg 23 of the micro x the doubts they recommend?