Infernal Buzzing Sound

Discussion in 'Mac Pro' started by Lycanthrope, May 6, 2007.

  1. Lycanthrope macrumors 6502a

    Lycanthrope

    Joined:
    Nov 1, 2005
    Location:
    Brussels, Belgium, Europe
    #1
    Has anyone else experienced this...

    The first week or so after purchase my Mac Pro was silent, now it has developed a most unpleasant buzzing sound, about a middle-C tone. If I take off the side-panel it stops and starts again after it's replaced - not total proof that it's to do with that but likely.

    Sounds like a resonation has been set up from the fans to the case or something??? It's really quite loud :mad:
     
  2. akadmon macrumors 68020

    Joined:
    Aug 30, 2006
    Location:
    New England
    #2
    I've had something close to what you describe happen with my MP ( it's been buzz free for the last couple of months). I was able to stop the sound by giving the case a slight tap. I suspect one of the fans was going out of balance and tapping "straightened" it out.
     
  3. diehardmacfan macrumors regular

    Joined:
    Mar 12, 2007
    #3
    try just touching the side of the mac pro or the top of it and see if the buzzing stops

    is the mac pro on a hardwood floor or a desk

    if it is not perfectly even it can cause a vibration
     
  4. NATO macrumors 68000

    NATO

    Joined:
    Feb 14, 2005
    Location:
    Northern Ireland
    #4
    While its running, lift the latch which locks the side panel in place, you may find this reduces or indeed eliminates the buzzing noise. I normally have mine running with the latch fully released.
     
  5. product26 macrumors 6502a

    product26

    Joined:
    May 30, 2005
    #5
    it is not a HUMM... it is a BUZZZ

    from the power supply.. mine does it too... bugs me because it is louder than the rest of the tower.
     
  6. Lycanthrope thread starter macrumors 6502a

    Lycanthrope

    Joined:
    Nov 1, 2005
    Location:
    Brussels, Belgium, Europe
    #6
    Indeed it is a buzz not a hum - seems I'm not alone with this though!

    It's on a wood parquet floor which in concrete underneath, although the house is new there's a fair change that it won't be even.

    Releasing the latch stops it, locking it restarts.

    I also wonder if it's a fan that's setting up a resonance - the first week of use I was running SETI on it 24/24 which obviously would have kept the fans running a little higher. Now in the last five days the SETI server has been down, no work units have been available so the client is dormant and the machine is generally in a idle state and this appears to be when it happens.

    I have a friend staying in the room right now so my chances for investigation are limited - he leaves today so I can dig in deeper.
     
  7. waremaster macrumors 6502

    Joined:
    Aug 27, 2006
    #7
    Mine buzzed too.. It started when I put 3 additional drives in the machine. It turned out that the drive caddies were slightly vibrating against the top rail. All I did was remove each drive and put an ever slight bend downward on the caddy so that it does not come so close to the top rail. Problem solved.
     
  8. Lycanthrope thread starter macrumors 6502a

    Lycanthrope

    Joined:
    Nov 1, 2005
    Location:
    Brussels, Belgium, Europe
    #8
    Hmmm, I'll check that out. I put the machine up on top of the desk to investigate but have kept in asleep a lot recently as SETI has been down.

    I did put an extra 250GB in the day I bought it so maybe this could have something to do with it. More news when I have it...
     
  9. Lycanthrope thread starter macrumors 6502a

    Lycanthrope

    Joined:
    Nov 1, 2005
    Location:
    Brussels, Belgium, Europe
    #9
    Could be it's a similar problem I have/had - while fitting some new RAM I have taken out the drives and the second one I added wasn't screwed into the tray as tightly as perhaps is should have been. After doing this it seems better. I'll observe...
     

Share This Page