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  1. #1
    Forgot my login from 1962 jareemon's Avatar
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    Default Front HDA jack noisy

    Hi guys, I've been noticing a very annoying but faint background electrical noise in my headphones lately. They were plugged into the front headphone jack, which has the HDA and AC'97 cables, with only the HDA plugged into the motherboard.
    I plugged the headphones into the back speaker output (green) port, and the noise was gone.
    After a bit of googling, found that this can be caused my the components inside the case giving off electrical noise and being picked up by the HDA cable.
    The internal front panel HDA cable itself is only just long enough to reach the motherboard jumper, not even long enough to route the cable properly, so it's touching the cooling shell of the video card, which just happens to be metal. Is there any household sort of stuff i could use to shield the cable? like maybe tin foil?
    I mention the video card because the noise is most often heard when something on the screen is moving or changes.
    Drivers up to date (VIA HD Audio)
    Sannheiser HD202 Headphones
    Antec Three Hundred Case
    Asus M4N98TD Motherboard
    Asus GTX560Ti OC GPU
    Windows 7
    i7 3770K // GTX680 // Intel 520 // Colossus White // Ultrasharp U2711 // SP-2500 // Mamba

  2. #2
    Unknown Device wratterus's Avatar
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    Default Re: Front HDA jack noisy

    The Antec threehundred and twelvehunderd have a ground loop problem with the front panel audio. I've had the same issue with the twelvehundred, damn stupid design, the engineer who thought earthing the audio with the USBs was a good idea should be hung.

    Fortunately for you the threehundred is a heap easier to get at than the twelvehundred.

    See here for the fix.

    http://forums.bit-tech.net/showthread.php?t=208880

    http://www.incrysis.com/forums/viewtopic.php?id=29778

    http://forums.overclockers.com.au/sh...php?p=11145597
    Last edited by wratterus; 30-09-2011 at 04:54 PM.
    Microsoft: "You've got questions. We've got dancing paperclips."

  3. #3
    Forgot my login from 1962 jareemon's Avatar
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    Default Re: Front HDA jack noisy

    Awesome! Thanks, but isn't the earth kinda there for a reason?
    i7 3770K // GTX680 // Intel 520 // Colossus White // Ultrasharp U2711 // SP-2500 // Mamba

  4. #4
    Computer "Specialist" Agent_24's Avatar
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    Default Re: Front HDA jack noisy

    Yes, but the motherboard or soundcard header where the other end of the front panel audio cable plugs in also has a ground.

    So even that the ground on the front panel end is going nowhere, it's still connected to ground on the motherboard\soundcard end.

    This is actually better because when you have a ground which is connected at more than one location, you get the possibility of a ground loop (because not all points may actually be at ground potential) and the problem you experienced.
    Non-system disk or disk error. Replace and strike any key when ready.

  5. #5
    Forgot my login from 1962 jareemon's Avatar
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    Default Re: Front HDA jack noisy

    OK, I think I get it now. I'll make the snip tonight, Thank you!
    i7 3770K // GTX680 // Intel 520 // Colossus White // Ultrasharp U2711 // SP-2500 // Mamba

  6. #6
    Computer Technician wainuitech's Avatar
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    Default Re: Front HDA jack noisy

    In a silly mood , after reading those instructions about the wire -- I cant help but think of This here
    MURPHIES LAW THOUGH ILLOGICAL as per NORMAL IS ACTUALLY THE MOST LOGICAL SOLUTION OF ALL.

    New Forum

  7. #7
    Computer "Specialist" Agent_24's Avatar
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    Default Re: Front HDA jack noisy

    Non-system disk or disk error. Replace and strike any key when ready.

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