Question about JVC AV-35750 35" TV

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TV has bright horizontal line

My tv turned off an on continously. I replaced a condensor C901 and now it stays on with a black screen and a bright white horizontal line. I replaced condensor C421 and have resoldered the vertical IC. I have sound and can run channels. Can some one help?

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  • Anonymous Nov 05, 2007

    sound stays on bright narrow horizontal line at the center of the screen, wish to know if repairable or not

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Do some voltage checking on the ic and make sure that volages are reaching there, about 32 volts. if it is reaching, then you can change the ic there. but before you do that, check around that ic and make sure everything is ok there. good luck

Posted on Apr 08, 2007

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Hello
You have stated that your TV has a lot of horizontal lines before it went off picture. We say that lines as retrace lines. So many of them will there on the entire screen, at about one inch or so apart, horizontaly scattered along with picuture. At that time, you may be unable to down the brightness control also. Even though you have reduced the brightness control to zero position, there will be some brightness level on the screen. You should have to repair that fault at the begining. There is a voltage going to the picture tube base, known as screen voltage. That voltage determine the emission of the picture tube, and we call it a bias voltage. When it goes higher than normal, this trouble ie retrace lines will occur. In long run it may spoil the picture tube itself. I don't know what the case of yours.
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