Dalmango
Level 1 (0 points)

Q: Macbook Pro - Irregular charging.

Problem:

Sometimes the computer states (Not Charging) in the top right corner and the light on the L-Style adapter Apple Portables: Troubleshooting MagSafe adapters - Apple Support is showing to be green; despite not being fully charged.

 

Remedies:

I've tried resetting the SMC and PRAM several times. The charger seems to be working fine and I am very doubtful this is the problem.

 

Computer:

Macbook Pro;

17 inch early 2011;

Mac OS X 10.7.5 - Lion;

 

Fault Diagnosis:

  1. I think the problem could be a burnt out sensor in the computer itself.
  2. I haven't seemed to notice many problems in Bootcamp, which contradicts my burnt-out sensor theory; though I do not spend enough time in Bootcamp to certain this theory.

MacBook Pro, Windows 7

Posted on Feb 28, 2015 3:43 AM

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Dalmango

Q: Macbook Pro - Irregular charging.

  • All replies
  • Helpful answers

  • by OGELTHORPE,Helpful

    OGELTHORPE OGELTHORPE Feb 28, 2015 4:08 AM in response to Dalmango
    Level 9 (52,764 points)
    Mac OS X
    Feb 28, 2015 4:08 AM in response to Dalmango

    Open System Information>Power and post this from your MBP:

    (make certain that the charger is connected)

    Screen shot 2015-02-28 at 7.04.32 AM.png

    Also run an Apple Hardware Test:

     

    http://support.apple.com/en-us/HT201257

     

    Note that an error free AHT is not definitive.

     

    Ciao.

  • by Dalmango,

    Dalmango Dalmango Feb 28, 2015 6:34 AM in response to Dalmango
    Level 1 (0 points)
    Feb 28, 2015 6:34 AM in response to Dalmango

    Thanks Ogle, I'll be running the hardware test this evening; I was not aware of that feature so greatly handy.

     

    Screen Shot 2015-02-28 at 12.10.47.pngScreen Shot 2015-02-28 at 12.11.01.png

  • by OGELTHORPE,

    OGELTHORPE OGELTHORPE Feb 28, 2015 7:58 AM in response to Dalmango
    Level 9 (52,764 points)
    Mac OS X
    Feb 28, 2015 7:58 AM in response to Dalmango

    Aside from the battery showing a lot of use (761 cycles) I see nothing of concern in the System Information report.  Lets see if the AHT provides any relevant information.

     

    Ciao.

  • by Dalmango,

    Dalmango Dalmango Mar 1, 2015 9:10 AM in response to Dalmango
    Level 1 (0 points)
    Mar 1, 2015 9:10 AM in response to Dalmango

    Thanks Ogelthorpe, the Hardware Diagnostic test (online by holding Option-D) was fine; nothing disconcerting at all.

     

    I've spent a bit of time in Bootcamp today and the Battery doesn't seem to have any problems in Bootcamp so it must be some sort of firmware issue in Apple.

     

    Thank you for the Hardware Test, was not aware of that; so really cool I learned that from you; many thanks.

  • by OGELTHORPE,

    OGELTHORPE OGELTHORPE Mar 1, 2015 9:24 AM in response to Dalmango
    Level 9 (52,764 points)
    Mac OS X
    Mar 1, 2015 9:24 AM in response to Dalmango

    It may be that when you see that the led is green and the battery is not fully charged could be due to the fact that the battery, when it is charged to 100%, will no longer accept a charge until it drops down to ~95% charge level.  Then the charging process will invoked until it reaches 100% again and constantly repeated.  This is controlled by the OSX and is perfectly normal.

     

    Ciao,

  • by Dalmango,

    Dalmango Dalmango Mar 1, 2015 9:32 AM in response to Dalmango
    Level 1 (0 points)
    Mar 1, 2015 9:32 AM in response to Dalmango

    Thanks Ogel but that's not it. This is happening at charges so low as to 6%. It says 'Not Charging' in top right corner and the charger-light turns green.

     

    I believe it to be some sort of firmware issue as it does not happen in Bootcamp and seems to charge quicker in Bootcamp I think.

  • by OGELTHORPE,

    OGELTHORPE OGELTHORPE Mar 1, 2015 9:34 AM in response to Dalmango
    Level 9 (52,764 points)
    Mac OS X
    Mar 1, 2015 9:34 AM in response to Dalmango

    If that is the case, an appointment at an Apple store genius bar should be made.  As I stated earlier, an error free AHT is not necessarily reliable.  The technicians have better tools to evaluate your MBP.

     

    Ciao.