3 beeps and a blank screen

Discussion in 'MacBook Pro' started by Sidcek, Jun 20, 2010.

  1. Sidcek macrumors newbie

    Joined:
    Jun 20, 2010
    #1
    I dropped my camera onto the keyboard. The screen went blank, and 3 siren like beeps kept on repeating every few seconds. I turned the machine off and on a few times but the problem persists. Any ideas?? Ta
     
  2. lewis82 macrumors 68000

    lewis82

    Joined:
    Aug 26, 2009
    Location:
    Totalitarian Republic of Northlandia
    #2
    * 1 beep = no RAM installed
    * 2 beeps = incompatible RAM types
    * 3 beeps = no good banks
    * 4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
    * 5 beeps = processor is not usable

    I suggest you check if your ram is properly seated. It might have moved since you dropped something on the MBP.
     
  3. Sidcek thread starter macrumors newbie

    Joined:
    Jun 20, 2010
    #3
    3 beeps and a blank screen

    Thank you.

    Any idea how you do the RAM check?

    Ta
     
  4. lewis82 macrumors 68000

    lewis82

    Joined:
    Aug 26, 2009
    Location:
    Totalitarian Republic of Northlandia
    #4
    You have to open the laptop, remove the ram sticks and put them back. You can also just push gently on them. The goal is to verify that the pins are touching the contacts correctly.

    You should also use the hardware test once it is done. Insert the install DVD and boot while pressing D.
     
  5. Sidcek thread starter macrumors newbie

    Joined:
    Jun 20, 2010
    #5
    3 beeps and a blank screen


    Thank you very much... will try it tonight!
     

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