A cordial greetings to all, this cyberlux tv with chassis 34B1 presents / displays a flaw in the image that for me is something strange because it had not appeared to me; it turns on normal but after about five minutes it starts distorting the screen with colored stripes from the bottom up (also the audio is distorted) until the screen is totally covered with stripes that can not see the image, I changed capacitors in the horizontal part to discard that part and nothing, with a PC fan I was placing it in several parts of the chassis and in the front part of it carries the Q802, Q804, R826, R822, R823 and R709 is normalisa when I leave serca of those components, and I changed those transistors resistors and diodes but I did not achieve anything only with the fan is that it stabilizes, I upload an image so they have an idea of ​​the fault

look me testetia with fault detector is a spray that freezes has a nozzle that you can cool each component so you detect which is in defective component, but otherwise if you start well look first the area, reduce as much as possible and with the welder hot you support it above the components to see which is the one that produces the defect