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    CF-27 sound with static

    Discussion in 'Panasonic' started by KLonsdale, Mar 25, 2009.

  1. KLonsdale

    KLonsdale Notebook Evangelist

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    I know that CF-27's have sound card problems, but from searching the threads I was unable to find an answer to my situation. I can hear the proper sounds coming from speaker, but there is a lot of background static. Is this a problem with the sound unit, or do I have a short somewhere between the sound unit and the speaker?
     
    KLonsdale, Mar 25, 2009
    #1
  2. Doobi

    Doobi ToughBook DeityInTraining

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    Sounds like a short.
     
    Doobi, Mar 25, 2009
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  3. Toughbook

    Toughbook Drop and Give Me 20!

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    Either a short or a bad or torn speaker...
     
    Toughbook, Mar 25, 2009
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  4. marconi

    marconi Notebook Consultant

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    ...or bad capacitors !!!
     
    marconi, Mar 25, 2009
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  5. KLonsdale

    KLonsdale Notebook Evangelist

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    Thanks everyone, now I know where to start.
     
    KLonsdale, Mar 26, 2009
    #5
  6. rickdog

    rickdog Notebook Guru

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    Hey, my 27 has that problem. Low level static and sometimes it sounds like it wants to make regular sound but can't.
     
    rickdog, Mar 27, 2009
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  7. mnementh

    mnementh Crusty Ol' TinkerDwagon

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    I have run into a corrupted/incorrect audio driver causing this...

    mnem
    Snap!Crackle!Pop! is what expect to hear from my breakfast cereal, not my laptop...
     
    mnementh, Mar 27, 2009
    #7
  8. KLonsdale

    KLonsdale Notebook Evangelist

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    Well if it is a driver problem, which driver would you suggest I try since I am running win xp on a mk4.
     
    KLonsdale, Mar 28, 2009
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  9. tough-2-go

    tough-2-go Notebook Deity

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    It is not a driver problem it is a hardware issue. This is a common failure on the PIII 500MHZ models it is a problem in the output amp of the sound chip. I have a couple units with the same problem never got around to doing any component level repairs so I can't tell you exactly what to replace except the whole motherboard. :mad:
     
    tough-2-go, Mar 28, 2009
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  10. mnementh

    mnementh Crusty Ol' TinkerDwagon

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    Well... if this is a known weakness in the model, then I'm going to go with T2G on this one.

    I've just had a LOT of problems with those d@mned Realtek AC97 series integrated sound chipsets. They sell to ANYBODY without validating the driver stacks; as a result, if you cannot get known good drivers from the OEM of your particular device (and believe me, there are TONS who don't keep them on their website), you may spend WEEKS trying different builds of the "AC97" driver until you find one that actually works. Total PITA.

    mnem
    Oh joy... little Marcus dwagon is now in the "bitey" stage...

    mnem
     
    mnementh, Mar 28, 2009
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  11. mibru

    mibru Notebook Geek

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    Hi there. I have got three CF-27's Mk2 and they all have some sort of static sound in them. The sound is most noticeable when accessing the bios or accessing the harddrive (rumble noise). You can actually hear the bytes being thrown to the harddisk.

    Two of the CF-27 have a high power speaker in the front (next to the wireless switches) and the noise is much more noticeable compared to the CF-27 with the weaker speaker at the bottom. I think it is an hardware issue and has something to do with improper shielding. I just turn the volume down a bit.
     
    mibru, Apr 11, 2009
    #11