Macbook Pro 13 2009 - 0% Charge / No Charge Problem

Discussion in 'MacBook Pro' started by gruv2ths, Mar 22, 2015.

  1. gruv2ths macrumors newbie

    Joined:
    Feb 4, 2011
    #1
    All,
    My Macbook Pro 13 Mid 2009 will not charge.
    • The MagSafe Stays Green
    • Happened when I plugged back in an aftermarket Anker Battery
    • All of the power parts seem to be OK

    Also the =SMBUS_BATT_SCL and =SMBUS_BATT_SDA (battery comm) are <100 ohms when the battery is plugged in. High resistance when battery is unplugged. Is that correct? Also where is the part on the schematic circled below?

    And I also found the burnt part circled below. Anyone know what that part is and even better a part number?

    Thanks in advance!!
     

    Attached Files:

  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    I wouldn't trust or recommend any non-Apple battery or adapter, due to the number of problems reported with "knockoffs". Also, there is no assurance that knockoff batteries or adapters have the same charging technology that Apple uses, involving the battery, the MagSafe adapter and the Mac's logic board. To me, it's not worth risking your $2000 Mac to save a few dollars on a replacement battery or adapter, but the choice is yours.
    Battery Service and Recycling
    Apple Portables: Troubleshooting MagSafe adapters
    The link below should answer most, if not all, of your battery/charging questions, including tips for maximizing battery performance. If you haven’t already done so, I highly recommend you take the time to read it.
     
  3. gruv2ths thread starter macrumors newbie

    Joined:
    Feb 4, 2011
    #3
    Thanks GGJstudios, but that would have been helpful 2 or 3 months ago before I bought the aftermarket battery. I will definitely keep that info in mind when it is battery replacement time again. Thanks! :)

    But now i need circuit help. Any thoughts that can help get me out of this bind?
     
  4. gruv2ths, Mar 23, 2015
    Last edited: Mar 24, 2015

    gruv2ths thread starter macrumors newbie

    Joined:
    Feb 4, 2011
    #4
    So I took a bunch more data on my 0% charge / Anker aftermarket battery plug/unplug problem. Here is what I found:

    • The data pins on the battery measure 15.7 and 4.0 ohms to ground when the Battery Indicator Light (BIL is what that stands for right??)is plugged in
    • When the BIL is not plugged in and either the battery or the magsafe is plugged in pin 4 is 3.3V logic and pin 6 is 1.5V DC
    • When the BIL is plugged in, 0V on either battery data pin
    • I am reading 3.3V on the charge controller IC at pin 14
    • With either BIL plugged in or not the problem is the same 0% charge
    • Battery voltage is 11.97V with the magsafe plugged in or not
    • Pin 5 on the battery is low (pull down is intact)

    Going foreword, hoping to talk to an engineer at Anker and see what they are willing to admit. Also going to order the zeners that go on the battery comm pins, and a new BIL and of course a new APPLE battery. Should I just order another charger IC too (incase the SMbus pins are messed up)? Are the charge controller ICs available?

    I am assuming this Anker battery wreaked unholy hell in terms of ESD on my main board and BIL when I unplugged it and plugged it back in. Does that make sense?

    Am I on the right path here? Is there something else I should look at first?
    Any opinions would be really helpful!

    Thanks!
     
  5. gruv2ths thread starter macrumors newbie

    Joined:
    Feb 4, 2011
    #5
    Anker was no help.

    • Replaced the dual zeners on the battery SM Bus - no help
    • Cut the trace to the charger IC corresponding to the 1.5V SM Bus pin, that line jumps back up to 3.3V
    • So now need to replace the charger IC, it is a B&^%$ to get off the board

    Will let the forum know if this was the problem.

    To sum up, the battery SM Bus goes to the following places:
    • Battery
    • BIL Battery charge indicator
    • Charger IC
    • SMC
    • pull up resistors (see boardview .zip in the forums to find them)
    I was able to isolate the battery, the BIL and the charger IC.
    If it was not the charger IC and it was the SMC i think i would be shopping for a new board.
     

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