Question about Philips Magnavox 20MT133S 20" TV

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There are red, green, and blue lines running across the screentop

There are some very annoying lines that appeared about four weeks ago running across the top of my screen

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Bad feedback electrolytics vertical circuit.

Posted on Dec 02, 2008

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Picture went black except for partial green and blue lines &2 thin red lines


Vertical scan section circuit fault. Check and replace damaged component/s at its vertical scan output section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

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friend maybe your LCD was broken or loose. try to pull gently if it return to normal image.

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The only thing that happens is the red power light is flashing


The Vertical output ic is bad la7832 also has an open resistor in power supply off of pin 7 the ic.
Root cause is probably the zener diode next to the IC itself MTZJ75

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Mar 28, 2007 | Sony KP-46S25 TV

1 Answer

Green horizontal lines across screen


try adjusting the green screen control. remove the front bottom panel of the tv by removing any screws holding it in place. gently pull of the front panel, there are gromets holding it in place, you will be able to gently remove the front, just make sure you get all those screws. now reove the small wodden or plastioc panel. now you will see the screen/focus assy. check to see of the screen controls are the top 3 or bottom 3. adjusted the center screen it's the green one, the other 2 are the red & blue. it is best to adjust in a dark room where the lines will show up easier. good luck

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Having trouble with my Samsung television can you help please?


sorry silly girl seen this a hundred times!! The crt socket on the set needs to be carefully taken off and cleaned with wd-40 or tuner wash. its an intermittant connection on the screen contacts and the contacts that bias the grids.. It can be a green haze a blue haze or a red haze. Very common on 3 to 5 year old samsung tvs. Good Luck

May 08, 2006 | Samsung TXJ2879 28" TV

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