Question about Samsung CXM2785TP 27 in. TV/VCR/DVD Combo

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High-pitched noise when I turn on the tv

Just today, I turned on the tv and it started making a high-pitched noise. There is sound, but no picture. Could this be a problem with the high voltage oscillator circuit? Is it possible to order a main circuit board. If so, from where? I appreciate any suggestions/help.

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Re: High-pitched noise when I turn on the tv

No I think your problem is the horizontal output transistor blew out an that was a result of the flyback transformer going out or blowing up.. Good Luck TO you.

Posted on Mar 25, 2007

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Emerson EWC20D3 20 in. TV/DVD Combo what is that loud whining noise from the back

What happens in this case is a small transformer or the high voltage transformer vibrate hard enough to make that sound--not loose or bad but can cause the vibration.

I have seen in customer's homes where it was loud enough to chase cats right out of the room even in a large room.

Two ways to deal with this----with the set apart locate the part by ear or even probing with a plastic tool---when you press close to it, the sound will diminish or go away.

Believe it or not (in our shop) once located we use a hot glue gun to take the sound away---

usually if very loud it is the high voltage transformer on the main TV board (see photo of a typical one) not on the black part but on the iron like (it is a different material) core that looks like a U bolt.

it can irritate but poses no danger.


Mar 28, 2012 | Emerson EWC20D3 20 in. TV/DVD Combo

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A piercing high pitched buzzing noise when on. The sound volumne does not affect the buzzing. Always very loud.

You didn't post a model number but if this is a CRT TV (non-flat screen) the noise may be coming from the high voltage circuit and may be a warning sign of failure in the near future.

Aug 25, 2009 | Samsung Combination Televisions

1 Answer

High pitched sound comes from tv ---no controls on tv work--you have to unplug it to get the high pitch to go away

Is this a tube tv?IF it is the Flyback tranformer have a little still bar tranformer hight current volt make that noise take off the tv cover put some glue on the little steal bar should stop the noise or lower it very good.

Aug 12, 2009 | Combination Televisions

1 Answer

Y rca 27f500tdv tv high pitched noise

Change the horizontal IC are damaged

Jul 28, 2009 | Combination Televisions

1 Answer

TV making high pitch noise, stop working.

It must be the horizontal output transistor, it maybe short circuited. A short in flyback.

Apr 02, 2009 | Combination Televisions

1 Answer

I have a rca 32v343t atc010a and when i turn it on the power light comes on and the tv makes a noise like its coming on but then theres no picture or sound. I would like to finde out whats causing this to...

It sounds like the High voltage transformer has gone out. If you open the back of the tv and look on the right side, you will see a large (4 - 5 inch) black cylinder with a large wire coming out of the top. without touching anything, look and see if it is cracked.

Feb 18, 2009 | RCA Combination Televisions

1 Answer

Won't turn on.

Thats sound it's because the horizontal IC are in bad conditions and need to replace it.Good luck.

Jul 25, 2008 | Combination Televisions

1 Answer

High pitch buzzing and no picture

Your power supply, I mean the internal power suppy could be faulty, if you know how to deal with it, check it for abnormal oscillation, or get some help from someone who knows how to repair it.

Jan 28, 2008 | Sansui CVDV9000 9 in. TV/DVD Combo

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High pitched sound

you can fix this if you are very careful. it is call a high voltage leak. inside of the tv, close to where the power comes in will be what is called a high voltage transformer. if you are electrically inclined, unplug the tv, take the back off and then hook the power line up and turn the tv on. with the lights off in the room and a flashlight handy, look at where the sound is coming from. locate where the sound is coming from and look very carefully(very carefull not to touch with your hands or head to any part) for a white-ish blue arc of electricity. if you can see this then that is where the problem is. to fix it you will need to put something in between the two places that it is arcing from. a piece of plastic or silicon putty or anything non-conductive will work. again, be very careful or you might get the dogsnot shocked out you.

Jan 06, 2008 | Quasar VV-2002 20 in. TV/VCR Combo

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Power light comes on, followed by a high pitched whine

Hi, If after trying the TV again later and problem persist, repairs are in order. A high pitched whine is an indication of a fault at the horizontal section of your TV. The horizontal provides the high voltage for the picture tube. Your best bet maybe to seek the services of a qualified professional TV repairman since this involves component level repair, soldering/desoldering, use of soldering iron and VOM (testers) and knowledge of circuitry. Good luck and kind regards.

Aug 20, 2007 | Toshiba MW30G71 30 in. TV/VCR/DVD Combo

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