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2013 13" MacBook Air Fans running full speed. ASD Errors 820-3437-B

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  • #16
    So I made the ultimate STUPID mistake and put a slightly longer screw back into the fan top left screw hole. Now I get a screaming fan as soon as I press the POWER button. Any way to repair this, or did I just screw myself. I want to curl up into a little ball. I'm so pissed that I made that mistake. Apple does this on purpose, I swear...
    Last edited by wrbailey; 02-06-2017, 11:25 AM. Reason: fan -> Power

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    • #17
      More likely the fan is bad. There is nothing there that would affect the fan.

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      • #18
        That screw stand-off for the fan exactly on the opposite site of the U5620 and the screw did go into the board, are we sure that wouldn't screw stuff up?

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        • #19
          If there are no sensor issues in ASD it will be a fan issue and that is nowhere near that screw hole.

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          • #20
            I'll run ASD again.

            However my previous comment about ASD passing was prior to completely reassembling it and causing the screw hole damage. The fan was working as it should, nice and quiet, UNTIL I put the longer screw in the wrong hole, while assembling it. I'll try a different fan when I get back home, but I am not holding my breath. The stand off is exactly opposite of U5620. I'm sure it'll fail ASD now.

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            • #21
              Yep new fan still goes high speed as soon as it powers on.

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              • #22
                Run ASD! U5620 is still suspect as you did not replace it.

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