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New Power cord with old Mac Book Pro

5382 Views 18 Replies Latest reply: Jun 29, 2012 12:28 AM by Sunshine65 RSS
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Catie Calculating status...
Currently Being Moderated
Mar 1, 2012 4:56 PM

I have a MacBookPro from 2006. Recently had to get a new power cord. If I run the computer on the battery

and then plug the cord into the computer, the battery does not charge. The computer will shut down as

the battery dies and then the cord will start charging. Quite irritating as I have to shut down the computer to get the

computer to recognize the power cord.

 

Has anyone else had this happen and what can I do to remedy the situation?

Thanks.

MacBook Pro, Mac OS X (10.4.11)
  • John Galt Level 7 Level 7 (33,065 points)
    Currently Being Moderated
    Mar 1, 2012 4:59 PM (in response to Catie)

    Try an SMC reset. Jusifications for resetting the SMC are many, and include the following:

     

    Power
    The computer doesn't respond to the power button when pressed.
    A portable Mac doesn't appear to respond properly when you close or open the lid.
    The computer sleeps or shuts down unexpectedly.
    The battery does not appear to be charging properly.
    The MagSafe power adaptor LED doesn't appear to indicate the correct activity.

  • Andrew Wolczyk Level 5 Level 5 (5,205 points)
    Currently Being Moderated
    Mar 2, 2012 4:54 AM (in response to Catie)

    Is this an apple charger or a cheaper aftermarket one?

  • carl wolf Level 6 Level 6 (13,910 points)
    Currently Being Moderated
    Mar 2, 2012 5:06 AM (in response to Catie)

    The new power adapter is not working propelry, and you should contact Apple.  When you bring in the power adapter to the store, be sure to bring your computer too.

  • tighanleigh Calculating status...
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    Mar 2, 2012 5:31 AM (in response to carl wolf)

    I assumed this was normal, I have bought 2 of the newer designed magsafe chargers in the last 2 years and both of them only start to charge when I close my MBP's lid. It isn't any great hassle as long as you remember that you have to do this.

  • Andrew Wolczyk Level 5 Level 5 (5,205 points)
    Currently Being Moderated
    Mar 2, 2012 5:56 AM (in response to tighanleigh)

    There is a firmware update that addresses issues with the new chargers and older macbooks

  • tighanleigh Level 1 Level 1 (0 points)
    Currently Being Moderated
    Mar 2, 2012 9:56 AM (in response to Catie)

    I tried the firmware update but unfortunately it has made absolutely no difference to the the behaviour of my charger.

  • JoeyR Level 6 Level 6 (8,275 points)
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    Mar 2, 2012 10:53 AM (in response to Catie)

    Do you have the correct wattage?  Which MacBook Pro do you have (what size)?  What is the wattage on the charger you have?

  • tighanleigh Level 1 Level 1 (0 points)
    Currently Being Moderated
    Mar 2, 2012 11:38 AM (in response to JoeyR)

    I'm not sure if you want the info from Catie or from me! My MBP is a 17" 2.16Ghz Intel Core Duo purchased in 2007 and my chargers are both 85 watts. I apologise if I'm butting in on Catie's problem but the same thing is happening to me.

  • John Galt Level 7 Level 7 (33,065 points)
    Currently Being Moderated
    Mar 3, 2012 8:00 AM (in response to Catie)

    Have you examined the MBP's charging socket? Perhaps there is some contaminant preventing the plug from seating correctly and making electrical contact?

     

    I realize this is unlikely, given the behaviour you described, but with all this discussion about firmware etc. it never hurts to check the obvious.

  • tighanleigh Level 1 Level 1 (0 points)
    Currently Being Moderated
    Mar 5, 2012 8:55 AM (in response to Catie)

    Do you actually have to shut down your MBP? I have the same problem but all I do is close the lid before plugging the magsafe into the MBP you can then hear it power down and the magsafe light will illuminate. Once this has happened I open the lid and carry on from the screen or application I left - I have never needed to shut down the computer to solve the problem as I only need to let it go to sleep. Hope this is of some help

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