Macbook Pro A1278,13inch,2.7Ghz i7

Discussion in 'MacBook Pro' started by qaiser57, Jan 22, 2013.

  1. qaiser57 macrumors newbie

    May 21, 2011
    To replace the hard drive I did the following,
    1-Disconnect the battery connector
    2-Afterwards replace the hard drive.

    When I switched on the MBP it did not turn on, so restart it I did the following,
    1-Put back the old hard drive.
    2-Switch on the MBP but it did not work.
    For SMC reset I followed the apple advice but of no use,the MBP did not turn on.One more thing when the charger is connected the light fade off after some time.
    Some body may rescue me from this situation.

    Take care.
  2. Crzyrio macrumors 65816

    Jul 6, 2010
    Just check all the cables, one of them is prolly sticking out. DOuble check the battery cable. FYI, no need to unplug battery for hard drive change.
  3. qaiser57 thread starter macrumors newbie

    May 21, 2011
    Hi crzyrio,
    battery cables are good,do you any other suggestions.
  4. Crzyrio macrumors 65816

    Jul 6, 2010

    sorry for the late reply. There is ONE other cable that is very important.

    I will let you know and possible upload a picture when home.

    When I was replacing my CD drive I accidentally unplugged the cable and nothing would happen when I hit the power button. It is a tiny 2 prongged cable that comes from the top of the macbook.
  5. qaiser57 thread starter macrumors newbie

    May 21, 2011
  6. Freestar007 macrumors newbie

    Dec 25, 2007
    Found this thread:

    It could be your power adapter has gone bad. Find another one and test... even could go into an Apple store and 'borrow' a plug for a few minutes.
  7. Crzyrio macrumors 65816

    Jul 6, 2010
    Sorry about that. Check this cable, just nothing would happen when it was slightly unplugged.

    Attached Files:

  8. qaiser57 thread starter macrumors newbie

    May 21, 2011
    :apple:Hi, the power adopter is working good bcuz I checked it another MBP, the problem is beyond understanding that when I disconnected the battery cable and reconnected it again what went wrong that MBP failed to power up?????????? it seems that some ic has gone off, I do not know exactly....:D


    :apple:the picture shows the red circle this connector relates to audio and where as the other is for fan,these connectors of my MBP are perfect because I did not touch it.:D
  9. Crzyrio macrumors 65816

    Jul 6, 2010
    I know it is but the moment that is disconnected, nothing works lol. Double check the cable, even a little bit out and nothing will work.

    Just walk through all the steps you did and re sit the HD you will probably find something you missed
  10. qaiser57 thread starter macrumors newbie

    May 21, 2011
    MBP mythology

    Hi Guys,
    Thanks for your input and I have checked every thing as suggested by you but it did not work.Finally I took the very bold step, first I replace the charging chip 629 then afterwards the SMC chip,after replacing both the MBP start working as normal.
    The question remains the same that by adopting all safety measures I disconnected the battery conector and after performing the task the MBP becomes dead.......why it happened.Because in Macbook Technician guide it is clearly mentioned that when going to replace memory/HDD the battery has to be disconnected.
    Just for the sake of information,does any one bothers to respond on my question.

    Take care
  11. Rodster macrumors 68040

    May 15, 2007
    Disconnecting the battery is standard service protocol for ALL notebook repairs by every MFG including Apple. If you are careful you don't have to disconnect the battery. ;)
  12. qaiser57 thread starter macrumors newbie

    May 21, 2011

    :apple:Hi Guys, After doing some home work with Apple documents it is revealed that if some one tends to disconnect the battery of MBP to perform some upgrade or else then care should taken (1) if the machine is recently switched off and before removing the back cover,please wait for at least 10 min to get the hot components to cool down.

    Take Care.

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