12 Replies Latest reply: Jul 28, 2010 12:21 PM by wzm108
wzm108 Level 1 Level 1 (15 points)
I've noticed recently that the light on my MagSafe power adaptor for my MBP (April 2008)... when it's plugged in the green light will go out after a while yet it says charged in the menu bar. When I plug it back in after a while it is orange and is charging then will turn green after a while and go out. Is this normal?

Mac Pro, Mac Book Pro, Mac OS X (10.6.1)
  • sdschramm Level 3 Level 3 (500 points)
    is it plugged in un-even like this:

    Photobucket
  • wzm108 Level 1 Level 1 (15 points)
    yes it's plugged in fully......
  • Rod Hagen Level 7 Level 7 (31,985 points)
    Try resetting the SMC, check the cleanliness of the magsafe adaptor , and make sure that no pins are stuck.

    Cheers

    Rod
  • eww Level 9 Level 9 (52,975 points)
    You may have a "dirty" AC power supply that is causing the adapter to shut down for its own protection. Read about that here:

    http://support.apple.com/kb/TS1414
  • wzm108 Level 1 Level 1 (15 points)
    I looked at it and there was some dust in there that I got rid of but it's still doing it... the funny thing is even if the light is off it's still acting as if it's plugged it and it only does it once it has been charged. The green light will come on and then I will look and it's randomly off yet sometimes it will stay on and not go off.
  • Rod Hagen Level 7 Level 7 (31,985 points)
    I think eww was talking about the "line noise" issue under point three of the link to http://support.apple.com/kb/TS1414 , wzm, when he talked about a "dirty power supply", rather than about dust in the socket etc.

    Cheers

    Rod
  • wzm108 Level 1 Level 1 (15 points)
    I looked on that and it happens on all kinds of outlets and plugged directly into the wall. But the one thing is the adaptor WORKS just not the light on it.
  • Rod Hagen Level 7 Level 7 (31,985 points)
    wzm108 wrote:
    I looked on that and it happens on all kinds of outlets and plugged directly into the wall. But the one thing is the adaptor WORKS just not the light on it.


    In that case I'd be suspecting either a defective magsafe plug or a sticking pin. You could also try an SMC reset as I suggested earlier.

    Cheers

    Rod
  • A Yilmaz Level 1 Level 1 (120 points)
    Interesting… So NO ONE in this forum has seen this issue? Let me guess wmz108, the led turns off randomly and to get it working again you have to pull it out and plug it in again correct? Other than that the machine charges perfectly. My non unibody MBP 17" has the same thing. I wouldn't stress it too much. It's a pain but not worth worrying about. When it happens, push down on the head of the MagSafe (bit that plugs into your Mac). Don't push down so it becomes unplugged, but so that it's tilted yet still charging. Then let go and the LED will turn back on again. It's dodgy hardware. The charger is at fault here. Generally the cause is unplugging it while holding onto the cable. This causes the central pin to dislodge itself over time. Try it out for yourself. Plug the adapter in and wiggle the cable (where it meets the plug) around and the light should turn off. When you unplug it the plug it in again, the magnetic force pulls the light's pin back to where it should be. ***** cause Apple says, "oh it's just wear and tear." Funny because they said the same thing about the mysterious scratch that appears on the screen from the keyboard. I swear they are starting to become VERY cheap.
  • wzm108 Level 1 Level 1 (15 points)
    You're exactly right Yilmaz! Glad to see someone else in the world knows what I'm talking about. Mine is a 15" Non-unibody MBP. I didn't think there would be any cause for concern since it does still charge... I just didn't want to make a trip to the Apple store over something that doesn't really matter. And I do pull the charger out by the cable. It just seems easier then grabbing the plug lol.
  • eww Level 9 Level 9 (52,975 points)
    And I do pull the charger out by the cable. It just seems easier then grabbing the plug lol.


    And that's the cause of your problem. You're free to ignore the problem if you choose, just as you can choose to ignore Apple's advice not to abuse the cord. But if you continue to pull the cord to disconnect it, eventually you'll have a worse problem than the light failing to turn on, and it will be nobody's fault but your own.
  • wzm108 Level 1 Level 1 (15 points)
    It randomly started a couple months ago not doing it and I also purchased a secondary power adaptor when apple came out with the new ones. It seemed to have been after 10.6.4 came out...