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There was a high pitched screem then the picture

There was a high pitched screem, then the picture and sound went out. Now there are no picture or sound.

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Ur backlight video inverter board is dead,need a new board.

Posted on Oct 03, 2009

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My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.


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1 Answer

No picture on my philips 42PFL7422D/137 lcd I have already replaced both master and slave boards and my picture returned. After about a month or two the tv started to make a high pitch whistling sound...


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Sep 18, 2017 | Philips 42PFL7422D 42 in. LCD TV

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Front load kenmore 11047511701 makes a high pitch noise on spin cycle


this sounds like drum bearings wearing out,,,,open the door and check if thee is any lift in the drum only lift it a little if there is this is wear in the drum bearings,,,also check the motor bearings by spinning the drum by hand if it screems its motor bearings

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Sylvania SRT2232S Powers On, No Picture, High Frequency squeal


Hello there. I'm sorry to say that it sounds as if the element that actually energizes your screen is bad. It is most likely overheating. or quite poosible the power converter lost a resistor or 2.

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High pitch sound comming from tv!


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No picture no sound only the power light turn on and off


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check for high voltage s3ection of your TV. A Flyback transformer is defective especially in the high voltage cale of your flyback....

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1 Answer

No Picture


Rarely picture tube also shows the same symptom. High pitch sound is due to through deflection area LOT power supply is loaded. Compulsary horizontal output transister short. From your statement i think Lot puncture takes place. Change LOT and horizontal output transister and check tv is now working.

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No picture, just a high pitch sound


Sounds like the flyback and horz output is shorted.

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