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Tv tube problem

We purchased a console tv for 25 dollars and it worked fine for one day and then we turned it on a nothing but a line of color going across the middle. The sound is fine help!!!!!

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  • Anonymous Apr 23, 2009

    horizontal line aswell, cant service it, what should i do

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  • 232 Answers

It`s total vertical collapse, which means 3 possibilities, vertical IC has failed, vertical IC solder connections are broken, the B+ line (voltage to make IC run) to the vertical IC has failed. None of these problems are big dollar repairs, 1/2 hour repair by any qualified tech, Good Luck & Happy Holidays, BMW Rider

Posted on Dec 03, 2007

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Posted on Jan 02, 2017

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Hi and welcome to FixYa,

Initially, your described problem indicates that one of 3 color drive transistors (for the green) has developed either a cold solder (most likely) or an intermittent internal fault (leak). These transistors (or in some cases a single power pack module/IC) are normally found on a small squarish PCB (printed circuit board) at the very rear of the picture tube (CRT). At times, the green blank screen would also have diagonal fine lines or would appear to be overly bright.

In some rare instances, it could be the chroma section (least likely) or in worst case scenario the CRT (cathode ray tube) itself that is faulty (hope not).

Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

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Good day.

I think your problem is with the crt circuit. It is the one on the rear of your picture tube. Some loose connections may occured in there. Also, check if the flyback is arching. Sometimes, the voltage on the flybach itself causes this.


chris

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