Mystery Mid-2013 Macbook

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  • gigabyte898
    New Member
    • Sep 2016
    • 6
    • United States
    #1

    Mystery Mid-2013 Macbook

    This laptop has baffled quite a few people. Board number is 820-3437-B

    Initial check-in was for fans running at full speed and the OS being sluggish. Pretty obviously pointed to an SMC error, SMC reset didn't help but AHT pulled up SMC errors. Reflowed the SMC chip with no luck, pulled up the board schematic and tested the power rails (PP3V42_G3H, PPBUS_G3H, etc) SMC_RESET_L is high so it's powering on, they seem fine. The Magsafe daughterboard carries an SMC signal so I tried swapping that and the flex that connects it to the board with known good donor parts, no luck on those either. Eventually just gave in and got a new logic board for it.

    Brand new board has the exact same issue. Swapped out the SSD at this point and still nothing. Besides the top panel, LCD, and Battery, this is virtually a new computer. We didn't have an extra top panel on hand, to rule that out we disconnected it and the issue still persists.

    Anyone ever experience this before or have any ideas?
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Mystery Mid-2013 Macbook

      You have to run ASD to get the exact error message.
      Battery and touchpad have sensors that can mess with this as well.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • goontron
          5000!
          • Dec 2011
          • 4108
          • US
          #3
          Re: Mystery Mid-2013 Macbook

          Sounds like a sensor issue to me, not SMC....
          Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

          "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

          Excuse me while i do something dangerous


          You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

          Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

          Follow the white rabbit.

            Comment

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