MacBook Pro beeps and powers on only after 5 tries

Discussion in 'MacBook Pro' started by jparaujo, Aug 1, 2011.

  1. jparaujo macrumors newbie

    Joined:
    Aug 1, 2011
    #1
    I have a MacBook Pro from mid 2009 annoying me.

    When I turn it on, the led blinks rapidly, about 14 times, and then the Mac beeps once. The screen remains black and nothing happens. So I have to hold down the power button to force a shutdown. When I turn it on again, no beep or blinks, but still a black screen. I repeat that 3 more times and the Mac finally turns on and works normally. I use it, shut it down and when I want to use it again, I have to go through that process all over again: the beep, blinks and 4 tries until it comes back to life.

    I've opened it and tried changing the memories, the hard drive, but no different results.

    It's worth mentioning that I was reinstalling it for triple boot when that happened, however I've repartitioned the HD and it's back to the original state now, so I believe it does't have to do with that reinstall.

    I'm not able to run the hardware test pressing D before startup, even with the original disc.

    I googled for it but couldn't find any alike pattern.

    Any ideas?

    Thank you!
     
  2. sporadicMotion macrumors 65816

    sporadicMotion

    Joined:
    Oct 18, 2008
    Location:
    Your girlfriends place
    #2
    Your machine isn't detecting the memory that's installed. Try other DIMMs again ensuring that they are 100% compatible. Try one at a time (fill only one slot). If none work, then the memory controller (or something in the chain) on the logic board is probably faulty.
     
  3. jparaujo thread starter macrumors newbie

    Joined:
    Aug 1, 2011
    #3
  4. sporadicMotion macrumors 65816

    sporadicMotion

    Joined:
    Oct 18, 2008
    Location:
    Your girlfriends place
    #4

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