Macbook Air 11" A1370 late 2010 -- Magsafe short-circuit power-off

Discussion in 'MacBook Air' started by -tool-, May 22, 2015.

  1. -tool-, May 22, 2015
    Last edited: May 23, 2015

    -tool- macrumors newbie

    Joined:
    Mar 15, 2011
    #1
    I have a problem with the magsafe port. If the magnet makes contact with the pins of the macbook, it turn it off (My powerbutton doesn't work, so I have to short the board (removing bottom case))

    The magsafe cord was broken, when plugged in killed it instantly, I replace the magsafe cord, this laptop charge without problems but if a metal part came close to the pins the mac shut itself off.

    I think this charger killed the Magsafe board...

    I made a little video showing the problem. Did the same thing on other macs, non shut down. Just this one.

    I'm planing to isolate the magnet of the magsafe for preventing this to happen..

    Any advice?
     

    Attached Files:

  2. brdeveloper macrumors 68020

    brdeveloper

    Joined:
    Apr 21, 2010
    Location:
    Brasil
    #2
    Did you try cleaning the contacts? Use a dry toothbrush in both plug and socket. Maybe this is due to some metal residue. I had issues on my 2009 Macbook (it wasn't charging). After cleaning both contacts it started working again.
     
  3. -tool- thread starter macrumors newbie

    Joined:
    Mar 15, 2011
    #3
    I cleaned with isopropyl alcohol the contacts. I think something on the magsafe board was killed.

    I remember who was using it said something about burnt smell. Nothing now..

    The magsafe was dead, another charger, everything is ok.

    Now a little bit of contact kills the mac.
     
  4. -tool-, May 23, 2015
    Last edited: May 23, 2015

    -tool- thread starter macrumors newbie

    Joined:
    Mar 15, 2011
    #4
    Magsafe

    I just attached two videos.

    1- Plug in without touching the contacts, works perfect, charges and everything is ok.

    2- If you plug the magsafe that could produce some kind of contact to the pins. Boom mac powers off.


    UPDATE: I just check the power-adapter, magsafe plug OK, the cable was the faulty one. So this mac could been exposed to multiple short-circuits until the cable went fully shorted.

    So the problem lies on some short-protection circuit.
     

    Attached Files:

  5. -tool- thread starter macrumors newbie

    Joined:
    Mar 15, 2011
    #5
    Which component prevents the MacBooks to power off when you short the magsafe pins (mac-side).

    This is the only issue I saw now.
     

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