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Powering up without battery

11474 Views 12 Replies Latest reply: Oct 30, 2013 12:10 PM by petmay RSS
markfrompeacehaven Calculating status...
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Jan 20, 2012 6:32 AM

Hi all

 

I've got a 2008 MacBook Pro 15" which the Apple Store have determined has a dodgy battery. I will get a new one of course but I can't get the machine to power up with just the power supply. I've removed the battery and held the button down for 10 seconds as advised but nothing is happening.

 

Anyone have any hints or tips please?

 

Best wishes

Mark

MacBook Pro, Mac OS X (10.4.10)
  • Ralph Landry1 Level 7 Level 7 (28,815 points)
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    Jan 20, 2012 6:35 AM (in response to markfrompeacehaven)

    If the battery is in, does it startup?

     

    Does the MagSafe connector show a green light when connected?

  • eww Level 9 Level 9 (52,975 points)
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    Jan 20, 2012 6:38 AM (in response to markfrompeacehaven)

    How about putting the dodgy battery back in? Does it boot then? If so, leave it in until you have the new one, unless it has swelled, in which case leave it out and get the new one ASAP.

     

    The machine ought to boot without a battery, but sometimes they just won't.

  • Ralph Landry1 Level 7 Level 7 (28,815 points)
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    Jan 20, 2012 6:55 AM (in response to markfrompeacehaven)

    When you hold the button down and get nothing do you mean no sound at all?  No click of the hard drive starting, fan starting, just silent and none of the lights start?  When on the charger, does the sleep light come on or is it in shutdown mode?

  • Ralph Landry1 Level 7 Level 7 (28,815 points)
    Currently Being Moderated
    Jan 20, 2012 7:10 AM (in response to markfrompeacehaven)

    Assuming this was at aan Apple genius bar, were they using your charger, was the battery installed though bad, and is it possible to give them a call, explain the history and ask what they did because you can't get it to work at all?  As eww said, sometimes the machines want the battery in even if bad, which may be what you are seeing.

     

    I would take a shot at calling the store and see if they can help over the phone.  Or worst case, stop there again and say show me in detail what you do.

  • louie Level 4 Level 4 (2,945 points)
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    Jan 20, 2012 7:55 AM (in response to markfrompeacehaven)

    The official SMC reset

    http://support.apple.com/kb/HT3964

    is to remove the battery and AC power cord and hold the power button for 5 seconds. Of course, then they say to reconnect the battery and AC power before restarting. In your case, if the battery is really causing boot problems, you may be SOL until you get a new battery. You may also have a bad or drained PRAM battery inside.

     

    I'd try several combinations of disconnecting all power overnight, leaving the AC power connected for a day or 2 (in hopes of charging the PRAM battery), and/or resetting the SMC controller again.

     

    Be aware that if you do run without a battery, processor speed is limited:

    http://support.apple.com/kb/HT2332

  • lillithcame Calculating status...
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    Apr 2, 2013 7:22 PM (in response to markfrompeacehaven)

    Hey Mark -

     

    Although its over a year late, did you figure it out? I'm having the same issue with my 2008 Pro. Not sure if there's a way you confirmed if it was a dead PRAM battery or not.

     

    thanks,

    lc

  • aujanbh Calculating status...
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    Jul 16, 2013 7:46 AM (in response to lillithcame)

    I came here since I was looking for a solution too. What I did is remove the battery and the plug, press the start button and while presseing plugged the charger, released the start button and press again and it started!

     

    But when started the fan was on max speed and took very long time to boot!!

     

    my MBP is very old by the way.

  • anner108 Calculating status...
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    Sep 14, 2013 9:35 PM (in response to aujanbh)

    Same situation for me... I tried what you said about unplugging, pressing start, and plugging in again. Fan is on high, but no display. Is your mbp working? Can you share what you did after these steps?

  • petmay Calculating status...
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    Oct 30, 2013 12:10 PM (in response to markfrompeacehaven)

    I have the same issue with my 2008 MBP! I have search around on the Internet and it seems to have happened to a lot of 2007-2008 MBP users.

     

    Mine is completely dead and is not responding to a normal start up. If I use the offical SMC reset as per the link in this thread the computer makes does the normal sound when it starts (not the osx start sound). The screen remains black and fans are spinning - but no boot up what so ever.

     

    Please respond to this thread if you have the same issue with your MBP 2008.

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