Have a salute community of yoreparo, I have encountered this problem: I got this model PHILLIPS TV 21PT9457 / 55, it works well or worked but the fly back has a leak, I buy it with the same nuemeracion but it turns out that it did not work with the fly backs again and I also landed the horizontal. I replaced it with another horizontal one and removed the fly back again and I put the old one back and it worked, determine that the new fly back was the bad one but I went to change it, I got another one I put it and you worked it but soon it went out , and check everything, but I do not know what it will be. Can you give me a guide, please?