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Eric2025

Q: How long should it take for the Charger LED to light up?

I have a new 13 MacBook Pro and sometimes when I connect the charger, the LED does not turn on for 10 to 20 seconds. Is this normal?

MacBook Pro with Retina display, OS X Mountain Lion (10.8.3)

Posted on Jun 2, 2013 3:40 AM

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Q: How long should it take for the Charger LED to light up?

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  • by LowLuster,Helpful

    LowLuster LowLuster Jun 2, 2013 3:48 AM in response to Eric2025
    Level 6 (12,074 points)
    Jun 2, 2013 3:48 AM in response to Eric2025

    I don't have a new mac, mine is 1++ years old, but it never takes that long for the light on the charger end to come on when I either turn the wall switch on the charger is connected to or if I move my mac and charger and connect the mag end to the computer. It might take 2-3 seconds but no longer. So I'd say it is not normal and you might want to have apple check the system out. And at the least take it in and have this anomaly documented by the techs just in case at a later time it becomes a real problem.

  • by Courcoul,Helpful

    Courcoul Jun 2, 2013 3:52 AM in response to Eric2025
    Level 6 (14,193 points)
    Jun 2, 2013 3:52 AM in response to Eric2025

    Has been a cause of mystification and source of various threads already. It is never instantaneous, but takes a few seconds in most cases; mine takes 2 to 3 sec., depending on state of charge with fully charged the fastest. We've observed similar times in Retinas with MagSafe 2.

     

    Remember you have a one-year base warranty to take advantage of.

  • by Eric2025,

    Eric2025 Eric2025 Jun 2, 2013 8:00 AM in response to Courcoul
    Level 1 (0 points)
    Jun 2, 2013 8:00 AM in response to Courcoul

    Thanks! If the charger is plugged in and the computer is running, it seems to take 2 to 3 seconds. But if I close the computer and then plug it into the charger, the LED seems to take a lot longer. I don't know if it's because its in sleep mode, or what. It does seem to end up charging sooner or later.

  • by Courcoul,

    Courcoul Jun 2, 2013 10:13 AM in response to Eric2025
    Level 6 (14,193 points)
    Jun 2, 2013 10:13 AM in response to Eric2025

    Note that the whole color show is done by the Mac. The cable just has two conductors and carries the 18V produced by the power brick, so everything is done by the Mac's SMC thru the various pins in the connector. What you can try and see if it speeds up the LED is an SMC reset : http://support.apple.com/kb/HT3964