3 Blinks on Start-up, Need Guidance

Discussion in 'MacBook Pro' started by uthscsa19, Feb 27, 2009.

  1. uthscsa19 macrumors newbie

    Feb 27, 2009

    My Macbook Pro recently went into the shop to get its Logic Board replaced. While it was at the store, I decided to order a hard-drive as well as 4gb of ram. I installed the hard drive and memory the day I received my computer back. Everything seemed fine for a few days until I tried to boot up the computer one morning. All I got was a 3 blinks from the led on the screen release button.

    Link to Ram type

    I looked up what could be causing this, and I found that it was a memory issue. Well, it seems that if I crack open the laptop, remove the memory and reseat it, the laptop starts up fine. This normally gets me anywhere from a few days of use before it does the same again. I'm not sure that its that the memory become unseated though. In one instance, I shut down the computer on my desk and did not move it. The next time I tried starting it up, I got this issue. I have run the Mac Extended Hardware test once with no failures.

    I do not know what my next option is. Could it be bad memory? I don't think there is anyway to seat the memory any better than it already is. Any suggestions would be greatly appreciated.

  2. mbradyrn macrumors member


    Feb 10, 2009
    I installed the same Kingston memory and got the 3 blip LED several times. I thought that I had seated the memory -- it seemed to go in as far as it could -- but I still got the LED warning.

    After searching a bit, I found the 'ram' guy's suggestion that I had to seat the memory at an angle to get it to seat correctly. I tried this, and it worked.

    I honestly could not see much difference between his way and 'the way I've always done it," but I guess that's why he's the ram guy.

    Hope this helps. Mike

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