2011 macbook air 3 beeps

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  • TimT
    Badcaps Veteran
    • Nov 2012
    • 268
    • us
    #1

    2011 macbook air 3 beeps

    I everyone I have a 2011 macbook air 820-3023 it was giving giving 3 beeps and wont boot. I reset SMC and PRAM. nothing was working so I reflowed the ram chips. after reinstalling the board it powered up, screen came on and I got a chime then it powered off.

    now it wont power on and I am getting a dim green light on charger. after cheacking the board Q5310 was getting hot. I replaced that but it still gets hot.
    with Q5310 pulled pin's 4,5,6 are getting 16.6v pin 2 seems to be getting 0.6v
    Resistors R5311, R5312 test good. C6905 also test's good. no short to ground on Q5310. Don't know were to go next.

    Thanks
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4437
      • France
      #2
      Re: 2011 macbook air 3 beeps

      820-3023 RAM beeps = lost cause, it'll come back.
      As for Q5310, there is no reason for it to get hot, except if there is a solder bridge somewhere maybe.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • TimT
          Badcaps Veteran
          • Nov 2012
          • 268
          • us
          #3
          Re: 2011 macbook air 3 beeps

          so any macbook from 2011 stay away from? I know about the GPU issues.

            Comment

            • dellxps15
              Badcaps Legend
              • Feb 2014
              • 1591
              • italy
              #4
              Re: 2011 macbook air 3 beeps

              3 beep sould be ram problem very common on macbook air. i have a continuous beeping macbook and its not ram but i suppose pch or cpu.

              try a reflow on the ram.

                Comment

                • piernov
                  Super Moderator
                  • Jan 2016
                  • 4437
                  • France
                  #5
                  Re: 2011 macbook air 3 beeps

                  The MBP 13" 2011 (820-2936) is ok, sometimes the RAM slot closest to keyboard still fails though.
                  The MBA 11" 2011 (820-3024) usually doesn't get the RAM issue either.

                  The issue with reflowing the RAM on the MBA 13" 2011 is that it may make it work again for a short time, but it'll fail again soon enough. The root cause hasn't been identified. Reballing or replacing the RAM chips doesn't help. Maybe bad CPU, maybe bad trace.

                  EDIT: you can check joesipaq on Youtube/Twitch where he replaces the RAM chips one time, the Macbook comes back with 3 beeps again, replaces RAM chips a second time and it still beeps. https://www.youtube.com/channel/UCeZ...jrlqiTQ/videos
                  Last edited by piernov; 08-24-2019, 11:28 AM.
                  OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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