How to Fix a 45w Magsafe PS

Discussion in 'MacBook Air' started by Blackspeare, Feb 13, 2013.

  1. macrumors newbie

    Joined:
    Dec 26, 2011
    #1
    I have been using a MBA for a little over a year and the power supply has been a bit cranky----it wouldn't always charge the unit. I would try different receptacles and after a period of time it would suddenly work again! I recently found out the reason why and I don't know if it is universal, but if the power supply is too cold it won't work. Now if the power supply won't work I hold it over a light bulb until it feels warm to the touch and voila it works!
     
  2. macrumors member

    Joined:
    Oct 18, 2011
    #2
    This is really ironic to me as I created a thread a couple days ago about my girlfriend having similar issues with her macbook air (2011). She didn't realize it wasn't charging until it was down to 2% and the warning popped up. The way we got it to start charging is by using the extention cable that was included (which was in a drawer so it was probably warmer) the reason I say it is ironic is because I always complain how cold it is in her house. I wonder if there is any validity to this "warming the cable to get it to work" theory.
     
  3. macrumors 601

    Joined:
    Aug 27, 2012
    #3
    Clean the magsafe connector, both ends, that's ALL you can do. The unit is glued shut.
     
  4. macrumors 6502

    Joined:
    Jun 26, 2012
    Location:
    Virginia, USA
    #4
    Those power supplies are a touch notorious for failing prematurely, Google that problem. Replace it and be thankful for having Apple care to pay for the new one.
     
  5. macrumors 68020

    Joined:
    Oct 14, 2011
    Location:
    Ohio
    #5
    I had a 2011 MBA that was on its 3rd charger in a period of 6 months, one of those chargers died within a month. After several trips our local Apple Store (~60 miles away) and an email to Tim Cook, the MBA was replaced. Currently using that replaced MBA, about 10 months now, and have not had a single issue.
     
  6. macrumors newbie

    Joined:
    Sep 28, 2011
    #6
    Same for me here, 2011 MBA and charger pooped out on me right after apple warranty. Luckily, my credit card warranty covered it. Bought a new one and kept the old one as a back up...
     

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