Question about Toshiba 27A41 27" TV

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High Pitched Noise

My TV has recently started making a very high pitched noise. It doesn't happen everytime the TV is on, but it seems to be happening more and more frequently. It doesn't interupt the TV's sound. It seems to be coming from the back of the TV. Occasionally, we can get it to stop by touching or tapping the TV in the right spot, but that's only a very temporary fix. It's starting to become quite a nuisance. Any help is greatly appreciated. Thanks!

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Re: High Pitched Noise

Most high pitch noise comes from the anode conection on the picture tube thats connected to the flyback anode cap thats mean there is a high voltage leak,to stop the noise you can discharge the high voltage take off the cap and clean with alcohol.if the noise will have to put some red or clear silicone both the cap and tube stick together leave to dry for about 2 to 4 hrs.this will eliminate the leaking.good luck.

Posted on Jun 17, 2007

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Re: High Pitched Noise

Sounds like you have a coil or transformer vibrating in the horizontal output circuit. If you are experienced in taking the set apart, you may touch the circuit board in the area of the horizontal output circuit USING AN INSULATED TOOL such as a 8 inch long plastic rod. Use the rod to press on various parts of the circuit board and listen to the sound. If it changes,work to the most sensitive place and you're close to the problem. The yoke ( the coil around the neck of the picture tube) can also make a high pitched sound if the horizontal windings are lose in it. I hope this might give you an idea as to what is happening! Stargazer

Posted on Jun 16, 2007

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Re: High Pitched Noise

I would check out the horizontal stage for cold solder joints or bad solder spots.

Posted on Jun 15, 2007

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