E-Machines monitor E211H making intermittent high pitched noises

Call for Warranty inspection and repair. Sounds like a transformer that runs the control board.

https://www.google.com/search?q=BEKO+oven+22300x+makes+a+high+pitched+humming+noise

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Re: High pitched noise on computerized machines? UPDATE in new post (posted on 3/4/14 7:59 AM)
I recently bought my first electronic/computerized machines after many years of sewing on mechanicals and am still getting used to the ins and outs of computerized sewing. I first bought a Brother that I returned, then a Janome Magnolia 7330, which I upgraded to a 4120QDC. The Magnolia made a high pitched noise that sounded like little cicadas (just not as loud!), but my dealer (who is also machine mechanic) said that is just "new machine sound" and when I took it in he said he could not hear it (it had lessened by that time too). The 4120 does not make the same sound, but it does make a low-volume high pitched noise when the setting is on some stitches - e.g. straight stitch. When you switch to overcast stitch, the noise goes away. It is not very loud, more like a background noise, and not unlike the noise my laptop makes when I turn it on. I can't remember if the Brother ever made a similar noise. My dealer said this is just new machine noise as well. Am I too sensitive to noise? Is this normal? Does anyone know why it would be there on some stitches and not on others? I've only had my machine for a week, and I absolutely love it - it stitches very well and the stitching is not noisy. I just need to know if this background noise is something to worry about.

No. The high pitched noise did not originate in the control panel but rather in a part of the machine that was chafing or rubbing against something. And now the mechanism is stuck. Check for that first before messing with a control panel.

Samsung LCD TV with no video and high pitched sound - Digital TV ...

www.tomsguide.com/forum/54120-4-samsung-video-high-pitched-sound

Nov 8, 2015 - 25 posts - ‎12 authors
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Is your LCD making a buzzing or high pitch noise ...

https://www.devside.net/blog/lcd-making-a-buzzing-noise

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TV not turning on; making high-pitched sounds - Tom's ...

Hi, It's time to get a new one. Is this a TV or a computer monitor.?

That actually is a normal sound, The machine is spinning at such a high speed rpm that a whistling noise is a common occurence.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

With a piece of wood or plastic hit the flyback with the monitor turned on. If you note some change in the noise. Replace the flyback.
Normally, it is the cause of the noise.

Warning: High Voltage!! Do at your own risk!!!!!!

Best regards,

If what we are talking about here an old model of monitor that has a bulky back, the high pitched frequency is caused by other electronic devices such as your speakers.

- Relocate your speakers away from the monitor
- do a factory reset on all settings on the monitor or if possible, do a degauss.

call an assistance to your technician...

need to change a new pump.