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Logic board repair help needed A1229 17"

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    #1

    Logic board repair help needed A1229 17"

    Hi
    All

    I hope everyone is well

    I am in need for some help. I have a 17" Macbook pro that was working very well untill a few days ago.
    It went idle and when I went back to wake it up it did not.
    I removed the charger and battery and kepted the power button pressed

    When i go to turn it on, I hear the hard drive spin and get a solid white light in the front on the latch button but doesnt display video,

    I have been doing allot of reading and people are suggesting its a video issue.
    I have done a reflow no change.
    I read some where on the forums some one said touch the "SYS RST" PADS to reset but I did this no reaction. I have tried bypassing the SMC but no louck.

    I started measuring voltages and inspecting the logic board for problems but cannot find any
    I have managed to read the scematics for my macbook pro and started testing votage on some of the chips and I am getting the right voltage according to the data sheets.

    If it was the common video problem then a reflow should have fixed it but I think something has failed but not sure. Please help

    I am hoping some one can help me to bring my mscbook pro by back to life.
    If I need to replace a component then that will be no issue,

    I look forward to the responses.
    Attached is the schematic that I found online

    Many Thanks
    Attached Files
    Tags: None
    #2
    Re: Logic board repair help needed A1229 17"

    after a pram reset, do you hear a chime sound ?

    Comment

      #3
      Re: Logic board repair help needed A1229 17"

      I forgot to add that the charger light is green and the battery charges
      the laptop turns on from the battery as well

      I am not sure but maybe a chip has gone or diode or something
      Please help

      Thanks

      Comment

        #4
        Re: Logic board repair help needed A1229 17"

        Reflow or Heatgun? A reflow isn't the best for testing because it doesn't always work. I have reflowed systems and they still had the same issue but right after a reball it was fixed.

        Does your macbook have an external video output?

        Do you hear the chime or any sounds at any time?

        Comment

          #5
          Re: Logic board repair help needed A1229 17"

          When I do the PRAM on the leyboard no reaction
          and no reaction when I touch the SYS RST pads on the logic board

          I reflowed with the hot air station not heat gun
          I have not got the hardware to do a reball maybe something to invest in later but not now

          Comment

            #6
            Re: Logic board repair help needed A1229 17"

            no chimes or beeps
            whats strange is that before if no ram was present the front white light would flash
            that doesnt happen any more
            neither does it beep

            Comment

              #7
              Re: Logic board repair help needed A1229 17"

              Can any one help
              Maybe its a fuse
              Are there arming measurements I can do.

              Comment

                #8
                Re: Logic board repair help needed A1229 17"

                Sorry typo
                Are there any measurements I can do

                Comment

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