Question about Philips Magnavox 27MS343S 27" TV

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Magnavox 27mdtr10s I have white horizontal lines on the top of the tv. It started out as one or two and is now about 4 inches worth. Would it be economical to have it repaired

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Its really a toss up. I have tried to replace alot caps on that board and could never find the source of the problem. Every one I get now I have resulted to replaing the board. The good news is that the board is less than 100 dolllars from the right repair shop if you can do it yourself. Other wisw you are looking at 100-150 part plus 150 labor and thus it would be uneconomical.

Posted on Feb 06, 2008

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White horizontal lines on top of screen


Replace all the electrolytic capacitors in the vertical output section circuit. There will be 5 or 6 of them. Replace the at one time. The fault you see is technically called " vertical retrace lies".

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You have some bad capacitors. They are located very near and next to your vertical IC. I would guess you would have to replace maybe four of these! Thanks for asking!

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It sounds as though you can see Transmission lines which are sent out with any broadcast at the top of an image, The TV should normally blank these out, i suggest checking your horizontal and vertical settings

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THAT THIN WHITE LINE IS YOUR HORIZONTAL LINE MEANING YOU ONLY HAVE THAT. THE GOO NEWS IS YOU HAVE HIGH VOLTAGE MEANING YOU ONLY NEED VERTICAL TO FIX IT.. I WOULD REPLACE THE VERTICAL TRANSISTOR OR CHECK FOR ANY BURNED RESISTORS ON THE VERTICAL SIDE

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1 Answer

White horizontal lines in my 27 in Phillips Magnnavox tv


I have seen this on mine. Check the cable going into your TV and make sure it is good. The ground portion of the cable could not be making a good connection.

Jan 17, 2009 | Philips Magnavox 27MS343S 27" TV

1 Answer

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Sounds like retrace lines. Leaky caps or worse can cause this.. Are you getting any vertical foldover at the top of the screen?

Jan 18, 2008 | Philips Magnavox 27MS343S 27" TV

1 Answer

White horizontal lines at top of picture


Yes, definitely worth fixing. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor (no more than USD4.00 in price) usually gets it working perfectly again. If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.

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