Electrical/rattling noise

Discussion in 'MacBook Pro' started by revalationist, Dec 22, 2012.

  1. revalationist macrumors member

    Joined:
    Dec 2, 2011
    #1
    When I start up the mac, I hear an electrical noise, as if something has short-circuited.

    This started when I was using the mac, it made a rattling, or the same noise I heard on startup.
    I found I could easily replicate the noise by tilting it. I immediately cold booted the mac (held down the switch for 10 secs) to turn it off. I stated it up about 20-30 minutes later, and got what I mentioned at the start.

    Again, later I found some sort of ash...or dust on the black bit of the hinge by tilting the screen back. I have not started it up since.

    bring amberlamps
     
  2. El Awesome macrumors 6502

    El Awesome

    Joined:
    Jul 21, 2012
    Location:
    Zurich
    #2
    For me that sounds like a dying HDD.
    I a HDD in my Mac Pro that makes similar noise, but tilting the whole tower helps me.

    Make a backup as long as you can, and get a new HD would be my recommodation.


    You can remove the HD, start up the machine and check if the noise is still there
     
  3. revalationist, Dec 22, 2012
    Last edited: Dec 22, 2012

    revalationist thread starter macrumors member

    Joined:
    Dec 2, 2011
    #3
    Well yes, but I'm not sure if I can start it up, because when I did, it wouldn't seem to go past the Apple for around 30 seconds, or even longer. I have an external hard drive I can back it up to, what do I do?

    EDIT: is it really a good idea to start it up again? Surely the HD can't fail whilst it's off?
     
  4. revalationist thread starter macrumors member

    Joined:
    Dec 2, 2011
    #4
    Alright, I'm backing up to time machine as we speak. Since I've booted it there were no noises so far.
     
  5. El Awesome macrumors 6502

    El Awesome

    Joined:
    Jul 21, 2012
    Location:
    Zurich
    #5
    When the whole system is on the HD you just removed, how do you think the system is gonna start up? :)

    Check if the sound is still there, if not, it's the HD.
     
  6. revalationist thread starter macrumors member

    Joined:
    Dec 2, 2011
    #6
    followup and late bump: one of the screws of the batteries came out. genius bar guys just fixed it by taking it out of the machine, said 3 screws were just fine anyway
     
  7. Interstella5555 macrumors 603

    Interstella5555

    Joined:
    Jun 30, 2008
    #7
    Sounds like a question for Schrödinger.
     

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