Is your LCD making a buzzing or high pitch noise?

This seems to be a real problem with some LCD Monitors, especially the entry level TN panels like the popular Dell models (one of which I’m in front of right now).

In my case, the monitor was fine for the first two months. But then started making a buzzing noise… 1) when on, 2) worse when in power stand-by mode, and 3) even worse when turned off.

Thanks Dell!

It seems as if the cheap capacitors manufacturers’ use in these LCDs, after a while, start to resonate at a high pitch frequency that is very annoying in a quiet room. I’ve read that some people have fixed this by opening up the monitor and putting epoxy resin around parts … something I was not ready to do.

Adjusting the brightness setting of the LCD managed to fix this problem. Since this changes the power the monitor takes, this also changes the frequency these cheap capacitors resonate at… Sometimes for the better. You’ll have to play around and see what works for you best.

Next time I’m going for a nice non-TN Samsung.

Other reported fixes include changing the refresh rate (switching between 50Hz or 60Hz), and disabling the internal/integrated speakers or setting their volume to zero (they might be on without you knowing).

21 thoughts on “Is your LCD making a buzzing or high pitch noise?

  1. Alex Menteer

    To fix this, you can also adjust the refresh rate of your monitor, which helps by a lot. I recently fixed my school’s computers with this. It’s fun using your computer skills at school, I’d say.

    To change these settings, follow this path:
    Start -> Control Panel -> Display -> Settings -> Advanced -> Monitor

    Below you will find an area labeled “Screen refresh rate”, or something to that extent.
    Simply lower the Hertz at which the screen refreshes, and the problem should be fixed.

    If you have a computer issue and need it fixed, feel free to e-mail me at:

    Best of luck!

    1. Isaac

      THANK YOU! Seeing as mine was at its lowest setting, I raised it to the highest and it stopped the high pitched loud noise that has been plaguing me for almost a month. You are AMAZING!

    2. Tractor

      Thanks for the tip on changing the screen refresh rate. I like in the UK and the mains power is 50Hz, the screen refresh was set to 60Hz and was making a buzzing sound on some pages (like google mail for some reason). Changed the screen refresh to 50Hz and it stopped buzzing.


      Hello Thank you so much for this info .
      The problem si my Dell have only one screen refresh rate = 60Hz ..
      i can not chang it .. cuz there is no other options !
      what to do ?

  2. babca

    “Next time I’m going for a nice non-TN Samsung.”

    Yeah, I own MPA panel Samsung SyncMaster 215TW (very satisfied!!), and have this problem too. It started making high pitch noise two months ago.
    I understand, it is already 4 years old (bought in 2006), but it cost me around $900… :/

  3. Meme

    I have bought today new viewsonic VX2250wm-LED.
    It buzz like an old crt monitor or broken power unit, high pitch also take place,
    not very loud, but distinctly heard over system case noise.

  4. Bruce

    my Samsung TV is making high pitched noises even if its turned off
    I will NEVER EVER EVER buy another Samsung product
    they are crap

  5. Remco

    Hé Everyone,

    My Samsung monitor was doing this aswell. Never had to much trouble with it since my computer made more noise. Now thanks to SSD’s It was far more noticeble. Changing the brightness and the refresh rate seemed to make it worse.

    Than (on a diffrent site) I found the solution that saved my sanity. It where the internal speakers. Apparently the volume was set to 85 the past 6 years even though I use headphones or external speakers for all my audio.

    Setting the volume to 0 takes care of the high pitch noise. I never had this much peace behind my computer.

  6. Anonymous

    Yes!, thanks Remco. I tried the brightness and contrast but it didn’t help. Then I unplugged the audio cable and the buzzing stopped. Turning down the volume helps but I’ll just keep it unplugged. I’ve got a Viewsonic vx2753. Finally some peace and quiet.

  7. Anonymous

    God thanks a lot Remco that help a lot i never thought about that coz i never used the Moniter’s speakers before, finally lol@Remco

  8. Anonymous

    I bought a Digitame monitor online and it makes a high pitched ringing constantly when off. Turning it on makes a high-pitched shrieking noise, and I couldn’t figure out how to fix it. Maybe it’s faulty.

  9. Jonathan

    I have a viore 2007 model and it makes a loud ringing noise from the time it’s turned on till it’s turned off. Even with the volume at 0 it still does it. Suggestions please!!! I really miss my gaming Tv lol

  10. Al

    Thanks so much my Samsung tv started this high pitch noise just tonight (about 6 years old) switched off internal speakers & Boom Noise GONE!!! Now using my home theatre for sound – havent used it in a while so great opportunity for better sound.


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