The red and green LEDs sound, the only thing that has a dark image sounds good (the image looks a few thousandths of a second and disappears and reappears) as if the backlight goes out and on .... two or three times per second.... this tv tube problem and was fixed before because the screen was black and was fixed 6 months went well ... and now it is faulty ... I'm going to upload photos of the source ... I saw that the potentiometer VR 9530 was touched and a resistance was soldered below ... I don't know why ...