high pitched whine lcd monitors factory

Hi. What you are experiencing is a form of coil whine. Try messing with the monitor settings in the included monitor on screen controls. You mentioned adjusting brightness on a previous monitor. Did you have any luck adjusting the brightness on this monitor?

It looks like your monitor has multiple inputs and an external power brick. I would try switching to a different hdmi port and moving the power brick as far away as possible. It may be your power brick that is emitting that harsh noise, and not the monitor itself. Try another power brisk. You can try listening to the power brick when unplugged from the monitor to see if it emitts that specific noise. This is not the most scientific test, as the brick is not under load when unplugged from the monitor, so it may not produce a coil whine at all. If it does, find a replacement / RMA from samsung.

The high pitched noise from many LCD monitors when their brightness is reduced can be utterly distracting. Here’s a simple workaround that can work quite well with most monitors for many users. Also, please participate in our Quiet / Noisy Monitor Survey!

Many computer users have run into the issue of whining LCD monitors. Usually, it does not occur when the monitor is set to full brightness, which is usually too bright for most users. The natural response is to turn the brightness down using the monitor’s controls. That’s when the monitor can start to emit some high frequency tones, which are described most often as buzzing or whining. The noise usually gets worse the more the screen is dimmed.

It can be piercing and annoying enough to overcome even relatively high ambient noise. If you’ve spent the time and effort to study the information on SPCR and managed to achieve super-quiet performance in your computer, this whine can be absolutely frustrating. In short, it can drive people crazy.

The source of the problem appears to be components in the electronic circuit which controls the brightness of the CFL bulb that lights most LCD monitors. Most likely, this is some form of PWM (pulse width modulation) circuit, a very useful tool that, alas, can have negative side effects. For example, while it allows a fan to start reliably at unusually low speed, an improperly matched PWM control circuit can cause a DC fan to emit more clicking, buzzing and chattering noise as it is slowed. A similar effect may be happening with the monitor CFL bulbs. To modify this electronic circuit in order to reduce or eliminate the whining noise is an impossible challenge for most users.

This workaround will obviously not work for LCD monitors that whine even at full brightness. A replacement with another sample or model is recommended in such cases. We have not tried replacing the CFL bulb of afflicted LCD monitors; it probably is not the cause, however. Interestingly, the whine of CRT monitors can usually be reduced by setting its internal brightness control down. It’s also not clear whether any LED-lit monitors suffer the same problem. CAUTION: If you are an image professional (or advanced amateur) who relies on color accuracy, this may not be a good solution. For details, please see the discussion in the forum linked below. If you find the color degradation with this approach to be serious, you may also want to try a combination of both monitor hardware brightness control and video driver software brightness reduction. With a decent monitor, for typical computer uage, you should be able to find a happy compromise between image integrity and aural peace.

Please help us help you! The SPCR staff and lab can only examine and report on a finite number of products. Reader contributions can expand our reach tremendously. Everyone viewing this page has a monitor. In the forum discussion linked above, please post the make and model of your monitor and whether it whines. If it does, describe the degree, nature and conditions. As this log grows, everyone can benefit by using it as a quick reference. When it gets big enough, we will turn it to a table with multiple models, samples and ratings, and keep it uptodate. It will become a highly useful resource for quiet monitor seekers.

We continue to explore the issue of high frequency tonal noise from many computer components. As we approach ever lower noise levels, this electronic whining often becomes critical; in “normal” (read: noisy) computers, it is masked by the noise of fans and hard drives. Power supplies, motherboards and video cards are the other main sources of electronic whine. The whine is often associated with power components, usually capacitors and coils. Poor circuit design is probably at fault; electronic resonances in circuits can cause the components to vibrate or ring, and the whining we hear is directly related to that ringing.

Thank you for posting this. It is still unresolved as of 12/6/2021. I have the same display. I run it in its native resolution of 3,440 x 1,440. I am having this issue where at random times, the display emits a high pitched "whine", like a dog whistle that a human can hear. I recorded it. It is extremely annoying to the point where it distracts from my work. At first, I thought maybe it was a cable issue. I have confirmed this issue both with HDMI and Display Port cables. Then I attempted to change the frequency from 60-100 Hz. Then I factory reset the display (thinking maybe a combination of brightness, contrast, sharpness, or audio level caused the issue). I confirmed this occurs with Mac OS, Windows 11, and Windows 10. I have the latest drivers from Dell and all systems are up to speed with System Updates. I"m unable to predict when this will occur nor can I determine why it does. I contacted Dell as this display is only 1 week old and they have issued a replacement. I will post back here on this thread if the replacement device emits the same issue. I hope it is a random occurrence because the display is beautiful, the speakers pretty good, and I don"t want to have to return it entirely and start my search for a display replacement all over.

PC monitors that make loud noises aren’t very welcome in most people’s homes, and chances are that loud, high-pitched noises coming from them are an indication of something that’s wrong. There can be multiple reasons why this occurs with monitors, which doesn’t particularly help.

Having a high-pitched noise coming from your computer is obviously very annoying, and furthermore makes the user experience horrible. So, why do PC monitors sometimes make high-pitched noises for no apparent reason?

The most common issue that causes noise coming from your PC monitor is that your LCD monitor has a problem regarding the circuits in the monitor that controls brightness. The solution is to raise the brightness to the max in your monitor settings. After this, you can lower the brightness in your GPU control panel to compensate for the high brightness of the monitor.

Now that you’re aware of the most common problem and solution regarding high-pitched noises coming from PC monitors, let’s go over it in detail. I’ll provide detailed information on how you do the above fix and further information on what to do if this solution doesn’t help you.

As I mentioned previously, LCD monitors sometimes have problems with the circuits in the monitor that controls the lighting. Without getting into specifics of the components, you can fix this by enhancing the brightness settings on your monitor.

Monitors have buttons, usually located at the bottom of the screen, that can control different settings for you. Exactly what these settings depend on what monitor you have, but brightness is a universal setting.

Another quick fix you can try is turning your monitor audio setting down to 0. For some monitors, this can be achieved in the monitor setting on the monitor itself. The button is usually found at the bottom of the screen, close to the power button.

Try to remove as many peripherals as possible, and see if your monitor still whines. Also, remove things such as TVs, radios, etc from the close proximity of your PC setup, as these things can cause interferences and make your PC monitor whine.

Remove dongles, game controllers, and other stuff from your USB ports, too. This way, we can quickly rule out any peripherals/other devices such as radios from being the reason for the high-pitched noises.

If you bought your monitor recently, chances are that you can still return it and get your money back. Manufacturing errors with monitors and similar products aren’t the rarest of occurrences, which means that your monitor can have some sort of manufacturing issue.

If you’re unlucky, the issue lies within your building’s bad electrical wiring, but I would still recommend that you try this out. Move it as far from its original position as you can within your household and see if the monitor still produces the high-pitched noise.

Users have reported that the noise scales with their refresh rate. This is to say, the higher the refresh rate, the louder the noise. This is therefore a bit of a desperate solution, but you can lower your refresh rate to see if the noise lowers in intensity.

I realize that it isn’t optimal to sacrifice the refresh rate in order to lower the annoying noise coming from your screen, but you can try at least. If this is the case, there is a high likelihood of your monitor having some sort of faulty component.

I"ll have to find some other monitors to test this on. It would be awesome if there were some commplace model that"s relatively loud for a wide pitch range. Said model might then be useful for musical hacks in the same vein as driving the stepper motors in old floppy drives.

I also tried test patterns at http://www.lagom.nl/lcd-test/ and http://www.testufo.com/. None of those made caused my screen to make an audible sound.

In normal operating conditions, there shouldn"t be such high pitched noise with monitors. Please connect the monitor to different AC outlet and try to lower the refresh rate.

1. Check the video cables. Make sure the cable is securely connected and if possible change the cable. If using an LCD TV in Video mode, make sure the cable is connected to the correct input.

It"s a fact of life that all computers emit RF noise due to their high frequency operation (yes, even the old 8-bit computers from the 1980s with their 1MHz CPUs) so it all depends on how well this noise is shielded from the analog side of the sound card. How good this suppression is depends on how good the combination of mobo and sound card are at suppressing it. A ground loop, or poor ground can amplify the problem. Maybe even the design and quality of the PSU can contribute it. It"s a tricky thing to design well and suppress.

Another person with the high-pitched whine issue. Original unit was really bad in terms of the noise. Replacement unit was slightly better but still bad. Spoke to Breville support again and asked them to please send replacement unit after someone had actually inspected it for this issue. Was assured multiple times on c…

Another person with the high-pitched whine issue. Original unit was really bad in terms of the noise. Replacement unit was slightly better but still bad. Spoke to Breville support again and asked them to please send replacement unit after someone had actually inspected it for this issue. Was assured multiple times on call by rep that once I sent back the 2nd unit they would repair this specific unit and send it back to me. Do you think they did this? Of course not. They sent me a 3rd replacement--a refurbished unit with the same issue. Breville says this is not an "established issue" because not all people hear the noise. It seems prevalent enough that it should be.

There is a very high pitched noise (not the fan, nor the power supply) which varies in loudness depending on the app that"s being used. It is at it"s most annoying when lots of text is on the screen e.g. Notepad document. And not so bad when some apps are minimised or not open.

When the computer is on and the monitor"s display is turned off and it"s on standby (the green light is yellow), the monitor makes a high pitched noise (I don"t really know how to describe it) lasting about a second. It stops for a second and then repeats and follows that cycle. It is kind of annoying. I"ve never had a monitor do this before.

There are several discussions online about LCD monitor noise where high-pitched monitor noise was significantly reduced by using a combination of two settings. If I remember correctly, the gist of the solution was to use the the hardware-based (i.e. built into the monitor) settings to turn down the brightness and contrast, and then using the Windows-based or graphics card driver settings to turn up the corresponding setting.

However, when the monitor is on there is a slight buzz which doesn"t really bother me. I noticed it when doing the test described above because the buzz disappeared when the monitor was turned off and was replaced by the high pitched noise. Anyways, when I increased the brightness to 100 (max) the buzz went away just like you described.

Click to expand...Are you near a Wal-Mart or Target store. You can pickup a decent 18.5 LCD Widescreen Monitor for $85 and up when it"s on sale. Off sale $119 and up.

I"ve personally never heard this problem with computer LCDs monitors before - CRTs often, but not LCDs. That said, it has been a problem with larger big screen LCD TVs in the past so I suspect as users buy larger computer monitors, the problem may become more widespread - compounded by the fact folks sit 2 feet in front of computer displays. For the record - it is most likely transformers buzzing as they are notorious for it - and since many newer monitors, including this particular Dell, house the power supply internally, so too does the main power transformer sit only 2 feet away.

These LCD monitors can stop working all of a sudden then after a few months you want to try to turn it on back and bang! It works! In this user case there is a defective transformer or something with the power regulator. But dell won"t fix it they"ll just replace new or factory service.

Click to expand...Sounds like your into Green way of life.. I am like that I don"t pollute! But LCD and CRTs can destroy our environment. But DELL doesn"t like to repair anything just reuse what they have on stock. Just takes to much man hours to repair anything today. Gone is the 48 hour burn-in test. I"ve repaired a large number of DELL Latitudes with bad LCD screens and DELL CRT were the worst ones to own back in the day. Now that LCD screens are more in the norm not all goes through enough testing or quality control at DELL (China DELL).

samsung monitors do the same when on. the workaround to those affected and it will only affect those who have manually adjusted the contrast /brightness levels is to have the contrast at 0 and brightness at 100% if you wish to have a dimmer screen to work with. the problem only occurs when the brightness control is below 75%

Click to expand...it is not LCDs or CRTs, but ALL electronics that causes concerns. This is a concern because as I noted, and you repeated, it is cheaper to replace than to repair. That"s fine for our check books, just not for the environment, or future generations.

it is not LCDs or CRTs, but ALL electronics that causes concerns. This is a concern because as I noted, and you repeated, it is cheaper to replace than to repair. That"s fine for our check books, just not for the environment, or future generations.

Click to expand...Well I always try to repair/replace the LCD panels it can be done most of it just components need to be replace in 15 minutes. Some clients don"t want the added expense to do that. STill doesn"t really take that time to do. But all these systems are leased with DELL. DELL can either give you a factory serviced replacement (means they had tried to fix it) or a brand new one.

In fact LCD some HDTV that use LCD panel can create this effect with the buzzing. Not everyone going to hear this noise. On the LCD Monitor you"re run on top of that hardware. Turning up the brightness or down shouldn"t be the fix. That monitor has issues and needs to be fixed. Just don"t sit there with the problem.

There was a report on USA TV on 60 minutes on the dumping of all these electronic equipments (computers, CRTs, LCDs an etc) like where they end up. China is where. I know we have companies that come and collect old CRTs, LCDs and systems to either destroy or resale. They"re called ECO but who knows what happens when they leave our client sites?

In this case, I think it is important for LCD monitor users (whether with notebook monitors, or PC monitors) to know that backlight and inverter problems are not uncommon, and most importantly, can be repaired fairly easily by a competent repair person, and less expensively than replacing the whole monitor - or worse, the entire notebook. This too helps cut down on ewaste, which is being exported and dumped, not only in poor Chinese village landfills, but Indian and African landfills too.

In this case, I think it is important for LCD monitor users (whether with notebook monitors, or PC monitors) to know that backlight and inverter problems are not uncommon, and most importantly, can be repaired fairly easily by a competent repair person, and less expensively than replacing the whole monitor - or worse, the entire notebook. This too helps cut down on ewaste, which is being exported and dumped, not only in poor Chinese village landfills, but Indian and African landfills too.

The new monitor (with new cables as well) still unfortunately makes the buzz and whine noises but they aren"t quite as bad. No dead pixels that I can see either. But the screen does look a little different - a little bluer and darker/lighter in some places. I think that"s just because the viewing angle is really bad?

The new monitor (with new cables as well) still unfortunately makes the buzz and whine noises but they aren"t quite as bad. No dead pixels that I can see either. But the screen does look a little different - a little bluer and darker/lighter in some places. I think that"s just because the viewing angle is really bad?