Question about Philips Magnavox 27MS343S 27" TV

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Humming noise television makes a humming noise towards the back of the set and gets louder when you turn it on it seems to affect the screen you can see a wave go from bottom to top

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Change the filter capasitor of the main supply, the big capasitor .

Posted on Oct 01, 2008

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Check its main power regulator section circuit. Replace all the electrolytic capacitors there. This is a power supply fault.

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1 Answer

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If the noise is louder appears as if sparking inside the set than turn off set as there may be leakage in the EHT (extra high tension transformer) which can be replaced by some technical expert,if the noise is not louder than there is failure of internal power supply,get it repaired by technical expert.

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2 Answers

I have the same problem with the HLR4667W model.


The noise could be from the try joint on the main Board please try resoldering them all.
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Thks..

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1 Answer

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1 Answer

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Hello olfogieo,

 

This sounds like the IHVT (flyback) is arching and or going bad or the horizontal frequency is changing. you may have to remove the back of the TV and tell me if you see any arching from the flyback.  I would not suggest that you attempt to repair this since the high voltages section have voltages that can kill.

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1 Answer

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There is a coil in the set with a magnet glued to it, called the horizontal linearity coil. Sometimes the coil "sings", making a squeeling sound. I have seen this many times, and there really isnt anything actually electrically wrong with the set. To stop the squeeling the coil should be replaced.

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My panasonic Tv pic suddenly turned into a blue color I can't see the pic any more just can hear the audio.....any solutions????

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