Windows 8 and 8.1 Forums


weird sound.... coming from speakers

  1. #11


    Posts : 55
    Windows 8.1 Build 9600


    Quote Originally Posted by vrosa View Post
    Considering that you installed 8 and the problem persisted it must be a harware problem. Do the following to find the static noise source:

    1- Disable the moden in device manager - check if the noise still persists

    2- Disable the webcam microphone in device manager - check if the noise still persists

    3- Mute Line-in - check if the noise still persists

    If the steps above dont make difference probably it's a speaker defect

    I hope it helps
    whats moden? sorry im not familiar with hardware terms...

    i did the disable mic and webcam in dev manager still the same (note..if i play sound etc )

    how do i mute the line in? i did the click the speaker icon in win 7 taskbar and clicked mute
    very silent .....

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  2. #12


    Although Most laptops don't have a line-in jack, if your laptop has its level control will appear in Speakers Properties. Click in the speaker icon in taskbar then in the bigger icon above volume control and go to levels tab. Line-in level control must be bellow Mic level control.

    About what's modem: Modem - Wikipedia, the free encyclopedia
    Attached Thumbnails Attached Thumbnails linein.jpg  
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  3. #13


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    Pink screen, been there... it's definitely hardware problems. I had to reheat my graphics card and reapply thermal grease... got an older laptop back in business.

    But anyway, in your case, since only the screen was opened, I think were dealing with a cable (screen? sound?) that lost connection (even partially is bad enough) but that's just my opinion on the current situation. I'm talking about those thin cables that pass under the plastic cover just besides or under screen.

    Does the noise persist in the BIOS also? Then it's hardware (hopefully cables... and it's not as bad as a fried MOBO or sound card)
    You should let them check the cable connectors (if they are properly plugged in) or to see if a cable is broke or cut by mistake (you never know what to expect with those thin fragile cables out there).

    Good luck
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  4. #14


    Posts : 55
    Windows 8.1 Build 9600


    thanks for the screen shot... done that...still same

    and for Hopachi... since i removed the speakers in device manager....when netbook starts in BIOS post it'll sound like a screeching sound
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  5. #15


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    Quote Originally Posted by noelian13 View Post
    thanks for the screen shot... done that...still same

    and for Hopachi... since i removed the speakers in device manager....when netbook starts in BIOS post it'll sound like a screeching sound
    Device Manager is within Windows and has (normally) nothing to do with the BIOS, there is sound in the BIOS (bad sound) and that means speakers (or something) are still on. You (or the repairman) still need to check the cables as I posted earlier, just to make sure that the connections are ok. Netbooks are fragile (have very small electronical components) and those tiny cables are easy to accidentally brake or disconnect so be careful.
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  6. #16


    Posts : 55
    Windows 8.1 Build 9600


    in my netbook bios there's no sound config or setting
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  7. #17


    Portsmouth Hants
    Posts : 772
    Windows 8.1 Pro with Media Center


    Following the repair of the screen luminaire, I would guess that the microphone cable has been routed wrongly and is running too close to the inverter circuit (this produces a high voltage (about 600v), high frequency signal which energizes the cold cathode illumination for the screen). If the signal is leaking into the audio circuit it will produce high pitch noise.

    The resolution would be to disassemble the screen again, and to neatly route the cables so that they do not foul the inverter circuit board, if necessary taping the cable to the casing, and ensuring that all cables are properly plugged in or terminated at either end. If damaged, any cable should be replaced, preferably with the identical Manufacturer's SKU.
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  8. #18


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    Quote Originally Posted by fafhrd View Post
    Following the repair of the screen luminaire, I would guess that the microphone cable has been routed wrongly and is running too close to the inverter circuit (this produces a high voltage (about 600v), high frequency signal which energizes the cold cathode illumination for the screen). If the signal is leaking into the audio circuit it will produce high pitch noise.

    The resolution would be to disassemble the screen again, and to neatly route the cables so that they do not foul the inverter circuit board, if necessary taping the cable to the casing, and ensuring that all cables are properly plugged in or terminated at either end. If damaged, any cable should be replaced, preferably with the identical Manufacturer's SKU.
    A very good explanation. I Agree.
    Check the cables and see if that's the problem.
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  9. #19


    Solo.
    Posts : 2,159
    Windows 10 Pro 64-bit


    Noel
    Just additional thought here.
    I think I agree your problem might be caused by an oscillating circuit in which some sensitive area in your motherboard's sound circuit isn't properly shielded or grounded, and something is caught in your netbook casing. It could just caused by (possibly) the repairman forgot to put back the shield or or drop something into it (who knows).

    If you decide to open the screen cover yourself to check the cable assembly, you'd better do it cautiously as the screen mostly using delicate transparent ribbon cables routed trough the hinge with double adhesive tape.

    I feel like you should insist in having the repairman reopen and reassemble it.

    Kevin
      My System SpecsSystem Spec

  10. #20


    Posts : 55
    Windows 8.1 Build 9600


    Quote Originally Posted by fafhrd View Post
    Following the repair of the screen luminaire, I would guess that the microphone cable has been routed wrongly and is running too close to the inverter circuit (this produces a high voltage (about 600v), high frequency signal which energizes the cold cathode illumination for the screen). If the signal is leaking into the audio circuit it will produce high pitch noise.

    The resolution would be to disassemble the screen again, and to neatly route the cables so that they do not foul the inverter circuit board, if necessary taping the cable to the casing, and ensuring that all cables are properly plugged in or terminated at either end. If damaged, any cable should be replaced, preferably with the identical Manufacturer's SKU.
    sorry i dont know how to open the screen in myh netbook, but maybe you might know Aspire one D255 is the model like a tutorial to open it may help if its okay as some tutorials use complicated methods .... or just words at all
      My System SpecsSystem Spec

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weird sound.... coming from speakers
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