ACER VN7 792G makes buzzing noise

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VODA
VODA Member Posts: 4 New User
edited November 2023 in 2019 Archives

Hi,
I bought the laptop from amazon.com on July 23, 2016. Currently, I live in Armenia and as I know Acer does not have official service center here (the nearest one is in Russia).

I have some problems with the laptop. It makes strange buzzing noise or some sort of quiet coil whine whenever I move the mouse, scroll a page or anything. The noise comes from the upper left corner. I've tried to use the laptop wifi card, HDD and DVD removed, but the noise is still present. I am sure that that noise does not come from the fans. The noise is very audible in silence. During the recording process, I was scrolling the Google Chrome page which was causing the buzzing noise and also an install wizard was running.

It will be difficult for me to send it for a repair as it is connected with big expenses. I need a piece of advice about the part causing the annoying sound. I would like to replace the part myself.
You can find attached the recording of that noise. 20170226_192534.jpgAlso, find enclosed the image indicating the area that the sound comes from. I understand that helping without diagnosing the laptop is not easy, but still, any advice will be greatly appreciated.

Thank you in advance!
Regards

 

https://soundcloud.com/jamesthomson90/record20170226193151

https://soundcloud.com/jamesthomson90/voice-009

 

Answers

  • Nivenor
    Nivenor Member Posts: 13

    Tinkerer

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    Firstly look at this: http://imgur.com/a/kykBk

    The noise you recorded is most probably a coil whine. Area highlighted on the photo is the CPU area. Most probably, sound comes from the one of CPU power coils.

    What you can do:
    1) Try to unplug USB devices. Maybe it sounds strange, but unplugging a device from the left USB port and plugging it to the right port (or vice versa) can help sometimes.
    2) Try to set minimum CPU state = 100% or maximum CPU state = 99% in Windows advanced power settings. Sometimes the coil noise appears only on certain CPU load level or certain CPU frequency range.
    3) Try to boot Windows in safe mode or boot any Linux distro from USB flash. This can help you understand, can your issue be resolved in software level, or it cannot. Sometimes the coil noise appears only when CPU is loaded by certain sort of software tasks. (E.g. one of my laptops whined with VMWare services running in background.)
    4) Forget about warranty and go to the nearest well-respected service center.

  • VODA
    VODA Member Posts: 4 New User
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    Thank you very much for your answer!!! I will try and post about the results.

  • RadeonHD
    RadeonHD Member Posts: 43 Troubleshooter
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    I have noticed the same coil noise on my vn7 laptop ever since I bought it. If you find a way to solve it please post here. 

  • VODA
    VODA Member Posts: 4 New User
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    Unfortunately, nothing helped. The buzzing sound comes from the back of the laptop and is present all the time, it simply intensifies when scrolling or doing anything. Time to go to a service center!

    https://soundcloud.com/jamesthomson90/voice-012 

    IMG_6935.jpg!

  • PacoRodriguez
    PacoRodriguez Member Posts: 4 New User
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    I have the same noise (or it sounds very similar, high pitch whizzing which gets louder when I move the mouse, and comes from the top left corner of the laptop) in my Acer Nitro 7 (AN715-51). This laptop is new from a couple weeks ago and I only heard it for the first time today.

    @Nivenor's suggestion #2, changing the maximum processor state from 100% to 99%, fixed it. 
    Nivenor said:

    2) Try to set minimum CPU state = 100% or maximum CPU state = 99% in Windows advanced power settings. Sometimes the coil noise appears only on certain CPU load level or certain CPU frequency range.

    To give more detail to the solution that worked for me: 
    • Windows 10 > Settings > Power & Sleep > Additional Power Settings > Change Plan Settings > Change Advanced Power Settings > Processor Power Management, and change "Minimum processor state" and/or "maximum processor state" from 100% to 99%.
    The noise stops when I do this, and if I change it back to 100%, the noise comes back!

    See this VIDEO which shows me changing back from 99% to 100%, and the hissing noise starts when I click "Apply": 
    https://youtu.be/tANIdOgPHXo

    What is the cause of this noise? Should I be worried about the health of my new laptop? Should I take it for maintenance? I live in the UK.
  • andylb
    andylb ACE Posts: 3,827 Pathfinder
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    I have the same noise (or it sounds very similar, high pitch whizzing which gets louder when I move the mouse, and comes from the top left corner of the laptop) in my Acer Nitro 7 (AN715-51). This laptop is new from a couple weeks ago and I only heard it for the first time today.

    @Nivenor's suggestion #2, changing the maximum processor state from 100% to 99%, fixed it. 
    Nivenor said:

    2) Try to set minimum CPU state = 100% or maximum CPU state = 99% in Windows advanced power settings. Sometimes the coil noise appears only on certain CPU load level or certain CPU frequency range.

    To give more detail to the solution that worked for me: 
    • Windows 10 > Settings > Power & Sleep > Additional Power Settings > Change Plan Settings > Change Advanced Power Settings > Processor Power Management, and change "Minimum processor state" and/or "maximum processor state" from 100% to 99%.
    The noise stops when I do this, and if I change it back to 100%, the noise comes back!

    See this VIDEO which shows me changing back from 99% to 100%, and the hissing noise starts when I click "Apply": 
    https://youtu.be/tANIdOgPHXo

    What is the cause of this noise? Should I be worried about the health of my new laptop? Should I take it for maintenance? I live in the UK.

    This Topic is old and dead. You have a different model, please start a new Topic for your question, thankyou

    Please click YES if I answered your question

    I am not an ACER employee
    Thank you and have a blessed day  B)

    ★★ ACE Pathfinder 2019★★

  • VODA
    VODA Member Posts: 4 New User
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    I use the same trick to get rid of that noise.
    As far as I know, the coil whine is a result of voltage changes inside the CPU, and it is a pretty normal phenomenon in physics. I don't think it will cause any problems in terms of laptop longevity. Also, it has been already three years that I own this laptop, and I haven't had any problem so far, besides the annoying buzzing sound. I don't think that it's something that people at Acer can fix. You either should return the laptop and search for one without coil whine or live with it. I live in Armenia.
  • PacoRodriguez
    PacoRodriguez Member Posts: 4 New User
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    I have the same noise (or it sounds very similar, high pitch whizzing which gets louder when I move the mouse, and comes from the top left corner of the laptop) in my Acer Nitro 7 (AN715-51). This laptop is new from a couple weeks ago and I only heard it for the first time today.

    @Nivenor's suggestion #2, changing the maximum processor state from 100% to 99%, seems to fix it: 
    Nivenor said:

    2) Try to set minimum CPU state = 100% or maximum CPU state = 99% in Windows advanced power settings. Sometimes the coil noise appears only on certain CPU load level or certain CPU frequency range.

    To give a more detailed explanation of how to find this: 
    • Windows 10 > Settings > Power & Sleep > Additional Power Settings > Change Plan Settings > Change Advanced Power Settings > Processor Power Management, and change "Minimum processor state" and/or "maximum processor state" from 100% to 99%.
    The noise stops when I click "Apply", and if I change it back to 100%, the noise comes back!

    See this VIDEO which shows me changing back from 99% to 100%, and the hissing noise starts when I click "Apply": https://youtu.be/tANIdOgPHXo

    What is the cause of this noise? Should I be worried about the health of my new laptop? Should I take it for maintenance? I live in the UK.
  • PacoRodriguez
    PacoRodriguez Member Posts: 4 New User
    Options
    I have the same noise (or it sounds very similar, high pitch whizzing which gets louder when I move the mouse, and comes from the top left corner of the laptop) in my Acer Nitro 7 (AN715-51). This laptop is new from a couple weeks ago and I only heard it for the first time today.

    @Nivenor's suggestion #2, changing the maximum processor state from 100% to 99%, seems to fix it: 
    Nivenor said:

    2) Try to set minimum CPU state = 100% or maximum CPU state = 99% in Windows advanced power settings. Sometimes the coil noise appears only on certain CPU load level or certain CPU frequency range.

    To give a more detailed explanation of how to find this: 
    • Windows 10 > Settings > Power & Sleep > Additional Power Settings > Change Plan Settings > Change Advanced Power Settings > Processor Power Management, and change "Minimum processor state" and/or "maximum processor state" from 100% to 99%.
    The noise stops when I click "Apply", and if I change it back to 100%, the noise comes back!

    See this VIDEO which shows me changing back from 99% to 100%, and the hissing noise starts when I click "Apply": https://youtu.be/tANIdOgPHXo

    What is the cause of this noise? Should I be worried about the health of my new laptop? Should I take it for maintenance? I live in the UK.
  • andylb
    andylb ACE Posts: 3,827 Pathfinder
    edited December 2019
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    @PacoRodriguez PLEASE start a new topic for your question, click "Ask a Question" on the main page. Posting in old topics with multiple questions becomes confusing to those of us who answer the questions

    Please click YES if I answered your question

    I am not an ACER employee
    Thank you and have a blessed day  B)

    ★★ ACE Pathfinder 2019★★