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3 beeps on start up

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Shane Carter Calculating status...
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Mar 22, 2012 7:34 AM

I'm getting 3 beeps on start up. I have replaced the RAM with RAM I know is good and it still beeps 3 times and doesn't boot. The laptop is less than a year old. It is a Macbook Pro 13".  Please help!

Macbook Pro, Mac OS X (10.6.7), We also support apple xserves.
  • CT Level 6 Level 6 (14,955 points)
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    Mar 22, 2012 7:37 AM (in response to Shane Carter)

    How do you know this RAM "is good" for this computer?

    It would appear the computer does not think so.

     

    http://support.apple.com/kb/HT2341

     

    Either the RAM is still problematic, or the machine itself has a hardware problem.

    Either way, I would take it in for warranty service.

     

    charlie

  • ~Bee Level 7 Level 7 (30,565 points)
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    Mar 22, 2012 7:54 AM (in response to Shane Carter)

    Shane --

     

    Perhaps the RAM sticks are not pushed in hard enough or seated incorrectly.

     

    Or that RAM is the wrong kind.

     

    Your Mac is very positive about it. 

    Look on About This Mac > More Info > System Report > Memory.

    See what type is there, i.e., DDR3.

    Is yours that type?

  • pennbank Level 4 Level 4 (1,515 points)
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    Mar 22, 2012 8:37 AM (in response to Shane Carter)
  • mk321 Calculating status...
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    Apr 25, 2012 12:13 PM (in response to Shane Carter)

    i fixed the problem by removing the ram and put them back in in different position

    i had 17 mbp 2011

    each ram was 8 gb

     

    hope this helps

  • boggslabayen Calculating status...
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    Jul 14, 2012 11:13 AM (in response to Shane Carter)

    Hi I am also currently having the same problem 3 beeps on start up. I have read articles from this site about the cause of the problem and most answers are pointing to ram failure or something, but in fact i dont think my imac doesnt have a busted ram. It all started when i'm trying to downgrade from lion to snow leopard, I cleaned up my HD from disk utilities and it was a success after that i inserted an OS X snow leopard installation disk then when i rebooted my iMac it just shows grey screen then started to beep.

     

    HELP! Please

  • lizardcarter Level 2 Level 2 (465 points)
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    Jul 14, 2012 11:18 AM (in response to Shane Carter)

    If you have already replaced the RAM and know it's good and is compatable with your type of computer, try doing a PRAM/NVRAM reset

     

    http://support.apple.com/kb/HT1379

  • boggslabayen Level 1 Level 1 (0 points)
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    Jul 14, 2012 11:36 AM (in response to lizardcarter)

    Hi lizardcarter,

     

    Are u addressing that reply to me? Or the original creator of this thread? If its for me do i need to test my ram even if i didnt even replace my ram in the first place? I dont even know where is it located

     

    TIA

  • lizardcarter Level 2 Level 2 (465 points)
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    Jul 14, 2012 12:00 PM (in response to boggslabayen)

    Hi boggslabayen,

     

    That reply was for the original creator, but for you it might help if you reseat it, sometimes that's the only issue.

    You can type in your serial number into this website or just find your model to find out how to reseat the RAM in these manuals    http://support.apple.com/manuals/

    Once you've done that, try doing a PRAM/NVRAM reset on your computer    http://support.apple.com/kb/HT1379

    Tell me if that works

  • ~Bee Level 7 Level 7 (30,565 points)
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    Jul 14, 2012 3:52 PM (in response to boggslabayen)

    boggs --

     

    What OS did your Mac come with? 

    Snow L or Lion?

  • boggslabayen Level 1 Level 1 (0 points)
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    Jul 15, 2012 5:12 AM (in response to ~Bee)

    @ ~Bee comes with lion OS but I have an OS X Snow leopard from my sister's iMac

  • ~Bee Level 7 Level 7 (30,565 points)
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    Jul 15, 2012 7:05 AM (in response to boggslabayen)

    That's what I was afraid of . . . You've put your Mac at pre-manufacturing OS status.  That's why it's not working,not to mention it's for a different machine.  There's no way that's going to work, boggs.  If you did a complete 00000 erase, and put back the OS yur machine was built for, it MAY work, but you might have pushed it over the ledge.

  • noondaywitch Level 6 Level 6 (8,130 points)
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    Jul 15, 2012 7:33 AM (in response to boggslabayen)

    boggslabayen wrote:

     

    @ ~Bee comes with lion OS but I have an OS X Snow leopard from my sister's iMac

     

    You do realise that even if it had worked to install, you wouldn't be able to charge or run from the battery?

    iMacs don't need battery management software and it isn't included on the grey disc.

  • ~Bee Level 7 Level 7 (30,565 points)
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    Jul 15, 2012 7:38 AM (in response to noondaywitch)

    Ah, yes . . . good point, noon.

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